Initial experimentation with Travis CI configuration
Initial experimentation with Travis CI configuration

This is not intended to replace Jenkins immediately, and Jenkins will remain the CI of reference for merging pull requests in the near term.  Long term, it is possible that Travis will give us better integration with github, so we are investigating its use.

Author: Michael Armbrust <michael@databricks.com>

Closes #230 from marmbrus/travis and squashes the following commits:

93f9a32 [Michael Armbrust] Add Apache license to .travis.yml
d7c0e78 [Michael Armbrust] Initial experimentation with Travis CI configuration

HyukjinKwon/spark,zhouyejoe/spark,metamx/spark,ajaysaini725/spark,pgandhi999/spark,kiszk/spark,mahak/spark,tengpeng/spark,akopich/spark,michalsenkyr/spark,huang1900/spark,rednaxelafx/apache-spark,zhouyejoe/spark,hvanhovell/spark,MLnick/spark,ericvandenbergfb/spark,byakuinss/spark,dongjoon-hyun/spark,adrian-ionescu/apache-spark,narahari92/spark,gengliangwang/spark,wangyum/spark,taroplus/spark,HyukjinKwon/spark,mike0sv/spark,LantaoJin/spark,tengpeng/spark,hvanhovell/spark,andrewor14/iolap,poffuomo/spark,highfei2011/spark,bOOm-X/spark,shuangshuangwang/spark,jrshust/spark,wzhfy/spark,vinodkc/spark,publicRoman/spark,ddna1021/spark,apache/spark,Aegeaner/spark,nchammas/spark,1haodian/spark,mzl9039/spark,xuanyuanking/spark,someorz/spark,metamx/spark,aokolnychyi/spark,michalsenkyr/spark,minixalpha/spark,mdespriee/spark,ConeyLiu/spark,srowen/spark,zero323/spark,nchammas/spark,HyukjinKwon/spark,mzl9039/spark,ddna1021/spark,xflin/spark,jiangxb1987/spark,minixalpha/spark,kissmetrics/spark,zhouyejoe/spark,lvdongr/spark,huang1900/spark,aokolnychyi/spark,1haodian/spark,panfengfeng/spark,saltstar/spark,guoxiaolongzte/spark,haowu80s/spark,facaiy/spark,alunarbeach/spark,kimoonkim/spark,icexelloss/spark,cloud-fan/spark,ibm-research-ireland/sparkoscope,tengpeng/spark,WindCanDie/spark,wangmiao1981/spark,JerryLead/spark,ajaysaini725/spark,rekhajoshm/spark,srowen/spark,kimoonkim/spark,chuckchen/spark,Aegeaner/spark,someorz/spark,SnappyDataInc/spark,aosagie/spark,stanzhai/spark,kissmetrics/spark,milliman/spark,bOOm-X/spark,andrewor14/iolap,andrewor14/spark,szhem/spark,guoxiaolongzte/spark,zero323/spark,dhruve/spark,yanboliang/spark,apache-spark-on-k8s/spark,saltstar/spark,srowen/spark,ConeyLiu/spark,MLnick/spark,taroplus/spark,ptkool/spark,shuangshuangwang/spark,apache/spark,map222/spark,shuangshuangwang/spark,sahilTakiar/spark,kiszk/spark,Panos-Bletsos/spark-cost-model-optimizer,darionyaphet/spark,debugger87/spark,lvdongr/spark,yanboliang/spark,lvdongr/spark,ericvandenbergfb/spark,poffuomo/spark,aokolnychyi/spark,vinodkc/spark,shuangshuangwang/spark,saturday-shi/spark,bravo-zhang/spark,taroplus/spark,SHASHANKB/spark,vinodkc/spark,saltstar/spark,witgo/spark,darionyaphet/spark,tengpeng/spark,janewangfb/spark,dbtsai/spark,akopich/spark,BryanCutler/spark,pgandhi999/spark,adrian-ionescu/apache-spark,brad-kaiser/spark,andrewor14/spark,jianran/spark,saltstar/spark,ibm-research-ireland/sparkoscope,panfengfeng/spark,hhbyyh/spark,zzcclp/spark,Panos-Bletsos/spark-cost-model-optimizer,apache/spark,zero323/spark,jrshust/spark,xuanyuanking/spark,facaiy/spark,panfengfeng/spark,brad-kaiser/spark,panfengfeng/spark,vinodkc/spark,dhruve/spark,szhem/spark,brad-kaiser/spark,eyalfa/spark,map222/spark,metamx/spark,Aegeaner/spark,minixalpha/spark,ibm-research-ireland/sparkoscope,yanboliang/spark,map222/spark,dhruve/spark,UndeadBaneGitHub/spark,jkbradley/spark,rezasafi/spark,rekhajoshm/spark,apache/spark,SnappyDataInc/spark,janewangfb/spark,markhamstra/spark,cin/spark,mdespriee/spark,eyalfa/spark,adrian-ionescu/apache-spark,alunarbeach/spark,jianran/spark,kevinyu98/spark,BryanCutler/spark,goldmedal/spark,ptkool/spark,szhem/spark,JoshRosen/spark,highfei2011/spark,patrick-nicholson/spark,tejasapatil/spark,ioana-delaney/spark,UndeadBaneGitHub/spark,zero323/spark,dongjoon-hyun/spark,actuaryzhang/spark,techaddict/spark,WindCanDie/spark,szhem/spark,sachintyagi22/spark,rikima/spark,someorz/spark,rikima/spark,lxsmnv/spark,SnappyDataInc/spark,alunarbeach/spark,zuotingbing/spark,vinodkc/spark,aokolnychyi/spark,ioana-delaney/spark,rednaxelafx/apache-spark,nchammas/spark,jiangxb1987/spark,ioana-delaney/spark,zhouyejoe/spark,nilsgrabbert/spark,goldmedal/spark,saturday-shi/spark,kevinyu98/spark,publicRoman/spark,holdenk/spark,pronix/spark,markhamstra/spark,ericvandenbergfb/spark,xflin/spark,xuanyuanking/spark,zero323/spark,jianran/spark,nilsgrabbert/spark,shuangshuangwang/spark,nlalevee/spark,LantaoJin/spark,icexelloss/spark,setjet/spark,bOOm-X/spark,jkbradley/spark,spark-test/spark,rednaxelafx/apache-spark,skonto/spark,minixalpha/spark,aray/spark,xuanyuanking/spark,publicRoman/spark,highfei2011/spark,shubhamchopra/spark,JerryLead/spark,pgandhi999/spark,andrewor14/spark,sachintyagi22/spark,stanzhai/spark,nchammas/spark,nlalevee/spark,pronix/spark,caneGuy/spark,kevinyu98/spark,metamx/spark,zuotingbing/spark,sureshthalamati/spark,rekhajoshm/spark,jiangxb1987/spark,kiszk/spark,BryanCutler/spark,LantaoJin/spark,witgo/spark,rednaxelafx/apache-spark,esi-mineset/spark,rikima/spark,liyichao/spark,debugger87/spark,andrewor14/iolap,darionyaphet/spark,ueshin/apache-spark,facaiy/spark,zzcclp/spark,loneknightpy/spark,sahilTakiar/spark,pronix/spark,vinodkc/spark,lxsmnv/spark,jlopezmalla/spark,maropu/spark,joseph-torres/spark,zzcclp/spark,akopich/spark,andrewor14/spark,milliman/spark,ajaysaini725/spark,icexelloss/spark,someorz/spark,pronix/spark,panfengfeng/spark,jiangxb1987/spark,skonto/spark,jrshust/spark,gioenn/xSpark,kevinyu98/spark,michalsenkyr/spark,wangmiao1981/spark,byakuinss/spark,minixalpha/spark,milliman/spark,mdespriee/spark,andrewor14/spark,akopich/spark,JerryLead/spark,kissmetrics/spark,markhamstra/spark,shaneknapp/spark,szhem/spark,bravo-zhang/spark,dongjoon-hyun/spark,hvanhovell/spark,ueshin/apache-spark,dbtsai/spark,bdrillard/spark,big-pegasus/spark,ahnqirage/spark,JerryLead/spark,shaneknapp/spark,facaiy/spark,goldmedal/spark,saturday-shi/spark,facaiy/spark,narahari92/spark,liutang123/spark,poffuomo/spark,ptkool/spark,andrewor14/iolap,witgo/spark,debugger87/spark,goldmedal/spark,apache/spark,publicRoman/spark,nilsgrabbert/spark,cloud-fan/spark,michalsenkyr/spark,bOOm-X/spark,ddna1021/spark,UndeadBaneGitHub/spark,MLnick/spark,eyalfa/spark,jianran/spark,brad-kaiser/spark,witgo/spark,SHASHANKB/spark,WindCanDie/spark,techaddict/spark,aosagie/spark,JoshRosen/spark,bravo-zhang/spark,setjet/spark,HyukjinKwon/spark,gengliangwang/spark,lxsmnv/spark,loneknightpy/spark,loneknightpy/spark,sachintyagi22/spark,liutang123/spark,nchammas/spark,brad-kaiser/spark,janewangfb/spark,LantaoJin/spark,JerryLead/spark,JerryLead/spark,dhruve/spark,cin/spark,icexelloss/spark,LantaoJin/spark,markhamstra/spark,xuanyuanking/spark,saturday-shi/spark,WeichenXu123/spark,ibm-research-ireland/sparkoscope,witgo/spark,markhamstra/spark,jlopezmalla/spark,rikima/spark,ahnqirage/spark,hhbyyh/spark,stanzhai/spark,shaneknapp/spark,ueshin/apache-spark,kimoonkim/spark,zzcclp/spark,setjet/spark,hhbyyh/spark,narahari92/spark,wangyum/spark,holdenk/spark,darionyaphet/spark,icexelloss/spark,lvdongr/spark,ConeyLiu/spark,jiangxb1987/spark,BryanCutler/spark,saltstar/spark,aosagie/spark,kimoonkim/spark,esi-mineset/spark,cin/spark,lxsmnv/spark,taroplus/spark,xuanyuanking/spark,UndeadBaneGitHub/spark,spark-test/spark,joseph-torres/spark,sahilTakiar/spark,maropu/spark,patrick-nicholson/spark,ConeyLiu/spark,ajaysaini725/spark,kissmetrics/spark,zero323/spark,shuangshuangwang/spark,mzl9039/spark,saturday-shi/spark,patrick-nicholson/spark,hvanhovell/spark,narahari92/spark,wangmiao1981/spark,zuotingbing/spark,witgo/spark,andrewor14/iolap,icexelloss/spark,gengliangwang/spark,lvdongr/spark,yanboliang/spark,JoshRosen/spark,SHASHANKB/spark,Aegeaner/spark,xflin/spark,rednaxelafx/apache-spark,byakuinss/spark,patrick-nicholson/spark,gioenn/xSpark,SnappyDataInc/spark,SnappyDataInc/spark,dbtsai/spark,xflin/spark,ahnqirage/spark,guoxiaolongzte/spark,jianran/spark,adrian-ionescu/apache-spark,aokolnychyi/spark,JerryLead/spark,chuckchen/spark,mzl9039/spark,SHASHANKB/spark,jkbradley/spark,aray/spark,map222/spark,apache-spark-on-k8s/spark,zuotingbing/spark,gioenn/xSpark,wzhfy/spark,big-pegasus/spark,loneknightpy/spark,techaddict/spark,someorz/spark,big-pegasus/spark,matthewfranglen/spark,nlalevee/spark,sureshthalamati/spark,skonto/spark,stanzhai/spark,kevinyu98/spark,minixalpha/spark,ron8hu/spark,alunarbeach/spark,sahilTakiar/spark,poffuomo/spark,techaddict/spark,cloud-fan/spark,ron8hu/spark,patrick-nicholson/spark,SHASHANKB/spark,stanzhai/spark,rekhajoshm/spark,goldmedal/spark,bdrillard/spark,rikima/spark,rekhajoshm/spark,kimoonkim/spark,hhbyyh/spark,kissmetrics/spark,aray/spark,szhem/spark,darionyaphet/spark,mike0sv/spark,techaddict/spark,ericvandenbergfb/spark,taroplus/spark,facaiy/spark,haowu80s/spark,pronix/spark,metamx/spark,WindCanDie/spark,mdespriee/spark,map222/spark,rednaxelafx/apache-spark,nchammas/spark,andrewor14/spark,rezasafi/spark,bdrillard/spark,actuaryzhang/spark,chuckchen/spark,actuaryzhang/spark,brad-kaiser/spark,debugger87/spark,mdespriee/spark,shaneknapp/spark,ioana-delaney/spark,liutang123/spark,Aegeaner/spark,mike0sv/spark,jrshust/spark,lvdongr/spark,nlalevee/spark,bravo-zhang/spark,rednaxelafx/apache-spark,stanzhai/spark,SnappyDataInc/spark,nilsgrabbert/spark,liyichao/spark,caneGuy/spark,debugger87/spark,maropu/spark,caneGuy/spark,liutang123/spark,eyalfa/spark,aosagie/spark,eyalfa/spark,kissmetrics/spark,rezasafi/spark,tejasapatil/spark,michalsenkyr/spark,milliman/spark,ptkool/spark,WeichenXu123/spark,byakuinss/spark,huang1900/spark,joseph-torres/spark,panfengfeng/spark,ddna1021/spark,aokolnychyi/spark,kimoonkim/spark,debugger87/spark,tejasapatil/spark,wzhfy/spark,kevinyu98/spark,shuangshuangwang/spark,sahilTakiar/spark,szhem/spark,setjet/spark,Panos-Bletsos/spark-cost-model-optimizer,janewangfb/spark,wangmiao1981/spark,cloud-fan/spark,cloud-fan/spark,jlopezmalla/spark,metamx/spark,aray/spark,joseph-torres/spark,shubhamchopra/spark,milliman/spark,ueshin/apache-spark,yanboliang/spark,bravo-zhang/spark,dbtsai/spark,1haodian/spark,sureshthalamati/spark,WindCanDie/spark,spark-test/spark,guoxiaolongzte/spark,shubhamchopra/spark,bOOm-X/spark,narahari92/spark,tejasapatil/spark,zzcclp/spark,guoxiaolongzte/spark,dbtsai/spark,mahak/spark,ahnqirage/spark,sachintyagi22/spark,xuanyuanking/spark,holdenk/spark,haowu80s/spark,saturday-shi/spark,liutang123/spark,alunarbeach/spark,gengliangwang/spark,map222/spark,cin/spark,zhouyejoe/spark,shubhamchopra/spark,ConeyLiu/spark,highfei2011/spark,dbtsai/spark,spark-test/spark,yanboliang/spark,sureshthalamati/spark,ajaysaini725/spark,aray/spark,loneknightpy/spark,gioenn/xSpark,SnappyDataInc/spark,ericvandenbergfb/spark,witgo/spark,publicRoman/spark,darionyaphet/spark,ddna1021/spark,ioana-delaney/spark,maropu/spark,MLnick/spark,zzcclp/spark,wangmiao1981/spark,BryanCutler/spark,mahak/spark,maropu/spark,michalsenkyr/spark,vinodkc/spark,ddna1021/spark,srowen/spark,bravo-zhang/spark,big-pegasus/spark,ioana-delaney/spark,sureshthalamati/spark,aray/spark,big-pegasus/spark,xflin/spark,someorz/spark,loneknightpy/spark,WeichenXu123/spark,UndeadBaneGitHub/spark,kissmetrics/spark,gengliangwang/spark,shaneknapp/spark,wangyum/spark,UndeadBaneGitHub/spark,narahari92/spark,bOOm-X/spark,sachintyagi22/spark,akopich/spark,map222/spark,actuaryzhang/spark,Panos-Bletsos/spark-cost-model-optimizer,nilsgrabbert/spark,rezasafi/spark,pronix/spark,icexelloss/spark,dongjoon-hyun/spark,saltstar/spark,tejasapatil/spark,haowu80s/spark,yanboliang/spark,dhruve/spark,rezasafi/spark,publicRoman/spark,ericvandenbergfb/spark,poffuomo/spark,pgandhi999/spark,liyichao/spark,dongjoon-hyun/spark,ioana-delaney/spark,andrewor14/iolap,apache-spark-on-k8s/spark,taroplus/spark,patrick-nicholson/spark,guoxiaolongzte/spark,setjet/spark,saltstar/spark,WeichenXu123/spark,maropu/spark,big-pegasus/spark,Aegeaner/spark,byakuinss/spark,jiangxb1987/spark,aosagie/spark,mdespriee/spark,janewangfb/spark,akopich/spark,apache-spark-on-k8s/spark,markhamstra/spark,shubhamchopra/spark,someorz/spark,hvanhovell/spark,MLnick/spark,shubhamchopra/spark,mike0sv/spark,caneGuy/spark,liyichao/spark,ptkool/spark,jkbradley/spark,dhruve/spark,haowu80s/spark,cin/spark,ahnqirage/spark,sureshthalamati/spark,sachintyagi22/spark,andrewor14/iolap,zuotingbing/spark,kiszk/spark,shaneknapp/spark,wzhfy/spark,Panos-Bletsos/spark-cost-model-optimizer,panfengfeng/spark,pgandhi999/spark,dongjoon-hyun/spark,goldmedal/spark,esi-mineset/spark,jrshust/spark,wangmiao1981/spark,zzcclp/spark,guoxiaolongzte/spark,ibm-research-ireland/sparkoscope,adrian-ionescu/apache-spark,bdrillard/spark,dhruve/spark,actuaryzhang/spark,joseph-torres/spark,narahari92/spark,kevinyu98/spark,ahnqirage/spark,tejasapatil/spark,huang1900/spark,jkbradley/spark,xflin/spark,jiangxb1987/spark,SHASHANKB/spark,highfei2011/spark,big-pegasus/spark,jlopezmalla/spark,skonto/spark,markhamstra/spark,tejasapatil/spark,gioenn/xSpark,HyukjinKwon/spark,HyukjinKwon/spark,bravo-zhang/spark,SHASHANKB/spark,hvanhovell/spark,ron8hu/spark,UndeadBaneGitHub/spark,srowen/spark,ptkool/spark,ron8hu/spark,milliman/spark,1haodian/spark,taroplus/spark,bdrillard/spark,LantaoJin/spark,WeichenXu123/spark,janewangfb/spark,jkbradley/spark,actuaryzhang/spark,JoshRosen/spark,ueshin/apache-spark,wangyum/spark,hvanhovell/spark,mahak/spark,rikima/spark,poffuomo/spark,mahak/spark,BryanCutler/spark,gioenn/xSpark,bOOm-X/spark,ron8hu/spark,dbtsai/spark,byakuinss/spark,andrewor14/spark,sahilTakiar/spark,haowu80s/spark,facaiy/spark,MLnick/spark,liutang123/spark,zhouyejoe/spark,MLnick/spark,rikima/spark,dongjoon-hyun/spark,caneGuy/spark,loneknightpy/spark,jlopezmalla/spark,BryanCutler/spark,WeichenXu123/spark,nlalevee/spark,aokolnychyi/spark,ron8hu/spark,ibm-research-ireland/sparkoscope,wzhfy/spark,nlalevee/spark,zhouyejoe/spark,holdenk/spark,mahak/spark,publicRoman/spark,esi-mineset/spark,ConeyLiu/spark,setjet/spark,wangyum/spark,nchammas/spark,WindCanDie/spark,Aegeaner/spark,rekhajoshm/spark,nilsgrabbert/spark,spark-test/spark,huang1900/spark,ueshin/apache-spark,ron8hu/spark,gengliangwang/spark,mike0sv/spark,rezasafi/spark,janewangfb/spark,shubhamchopra/spark,sachintyagi22/spark,bdrillard/spark,srowen/spark,wzhfy/spark,debugger87/spark,pgandhi999/spark,ahnqirage/spark,gioenn/xSpark,rezasafi/spark,ibm-research-ireland/sparkoscope,mahak/spark,techaddict/spark,ueshin/apache-spark,cin/spark,adrian-ionescu/apache-spark,spark-test/spark,nlalevee/spark,mike0sv/spark,liyichao/spark,esi-mineset/spark,alunarbeach/spark,jlopezmalla/spark,bdrillard/spark,aosagie/spark,xflin/spark,wzhfy/spark,jianran/spark,holdenk/spark,apache-spark-on-k8s/spark,apache/spark,nilsgrabbert/spark,liyichao/spark,sureshthalamati/spark,esi-mineset/spark,liutang123/spark,caneGuy/spark,darionyaphet/spark,setjet/spark,aray/spark,mzl9039/spark,cin/spark,skonto/spark,alunarbeach/spark,spark-test/spark,zuotingbing/spark,esi-mineset/spark,shaneknapp/spark,stanzhai/spark,jrshust/spark,srowen/spark,kiszk/spark,WeichenXu123/spark,jianran/spark,1haodian/spark,ConeyLiu/spark,jlopezmalla/spark,Panos-Bletsos/spark-cost-model-optimizer,jkbradley/spark,highfei2011/spark,huang1900/spark,techaddict/spark,holdenk/spark,skonto/spark,ptkool/spark,milliman/spark,apache-spark-on-k8s/spark,aosagie/spark,chuckchen/spark,1haodian/spark,kimoonkim/spark,joseph-torres/spark,skonto/spark,akopich/spark,saturday-shi/spark,jrshust/spark,hhbyyh/spark,tengpeng/spark,ajaysaini725/spark,mzl9039/spark,kiszk/spark,JoshRosen/spark,zuotingbing/spark,highfei2011/spark,zero323/spark,maropu/spark,chuckchen/spark,adrian-ionescu/apache-spark,wangmiao1981/spark,caneGuy/spark,ericvandenbergfb/spark,mike0sv/spark,lxsmnv/spark,huang1900/spark,1haodian/spark,HyukjinKwon/spark,brad-kaiser/spark,mdespriee/spark,eyalfa/spark,actuaryzhang/spark,tengpeng/spark,apache/spark,cloud-fan/spark,hhbyyh/spark,gengliangwang/spark,JoshRosen/spark,mzl9039/spark,wangyum/spark,ddna1021/spark,lvdongr/spark,metamx/spark,michalsenkyr/spark,poffuomo/spark,JoshRosen/spark,cloud-fan/spark,eyalfa/spark,holdenk/spark,sahilTakiar/spark,joseph-torres/spark,tengpeng/spark,minixalpha/spark,byakuinss/spark,chuckchen/spark,pgandhi999/spark,hhbyyh/spark,chuckchen/spark,apache-spark-on-k8s/spark,ajaysaini725/spark,wangyum/spark,WindCanDie/spark,rekhajoshm/spark,goldmedal/spark,kiszk/spark,patrick-nicholson/spark,lxsmnv/spark,Panos-Bletsos/spark-cost-model-optimizer,LantaoJin/spark,liyichao/spark,lxsmnv/spark