Update Travis to only gofmt against Go 1.3
Update Travis to only gofmt against Go 1.3

Signed-off-by: Andrew "Tianon" Page <4b2b69742da531f1900c4c4748d7a0ecda59626a@gmail.com>

abronan/swarm,LuisBosquez/docker.github.io,allencloud/swarm,chanwit/swarm,cpuguy83/swarm,JimGalasyn/docker.github.io,fugr/swarm,moxiegirl/swarm,bpradipt/swarm,shakamunyi/swarm,denverdino/denverdino.github.io,denverdino/denverdino.github.io,megamsys/swarm,jzwlqx/denverdino.github.io,denverdino/swarm,denverdino/swarm-1,londoncalling/docker.github.io,ealang/swarm,BSWANG/denverdino.github.io,gdevillele/docker.github.io,BSWANG/swarm,shubheksha/docker.github.io,LuisBosquez/docker.github.io,swarm-hooks/swarm,joeuo/docker.github.io,yp-engineering/swarm,rav121/swarm,krystism/swarm,u2mejc/swarm,johnstep/docker.github.io,denverdino/docker.github.io,danix800/docker.github.io,parapsyche/swarm,denverdino/swarm-1,liubin/swarm,ch3lo/swarm,ehazlett/swarm,LukasBacigal/swarm,linecheng/swarm,menglingwei/denverdino.github.io,aduermael/docker.github.io,JimGalasyn/docker.github.io,troy0820/docker.github.io,snrism/swarm,jay-lau/swarm,morpheyesh/swarm,shin-/docker.github.io,joaofnfernandes/docker.github.io,parapsyche/swarm,JimGalasyn/docker.github.io,aidora/pisces,bdwill/docker.github.io,shin-/docker.github.io,johnstep/docker.github.io,ezrasilvera/swarm,troy0820/docker.github.io,mgoelzer/swarm,aduermael/docker.github.io,jzwlqx/denverdino.github.io,atlassian/swarm,pdevine/swarm,yp-engineering/swarm,schmunk42/swarm,BSWANG/denverdino.github.io,denverdino/denverdino.github.io,dims/swarm,jimmyxian/swarm,shin-/docker.github.io,deis/swarm,abronan/swarm,schmunk42/swarm,shin-/docker.github.io,pdevine/swarm,sanscontext/docker.github.io,joeuo/docker.github.io,mountkin/swarm,denverdino/denverdino.github.io,moxiegirl/swarm,phiroict/docker,raoofm/swarm,u2mejc/swarm,docker/docker.github.io,tangkun75/swarm,gonkulator/swarm,shahankhatch/swarm,denverdino/swarm,alexisbellido/docker.github.io,thaJeztah/docker.github.io,bsmr-docker/swarm,NunoEdgarGub1/swarm,sanscontext/docker.github.io,rillig/docker.github.io,tangkun75/swarm,LuisBosquez/docker.github.io,affo/swarm,johnstep/docker.github.io,PeoplePerHour/libswarm,pssahi/swarm,cgvarela/swarm,docker/docker.github.io,marsmensch/swarm,aduermael/docker.github.io,dims/swarm,menglingwei/denverdino.github.io,errordeveloper/swarm,bsmr-docker/swarm,JimGalasyn/docker.github.io,rillig/docker.github.io,thaJeztah/docker.github.io,akerbis/armhf-swarm,shot/swarm,zkcrescent/swarm,tranceitionalMynd/swarm,echupriyanov/swarm,denverdino/docker.github.io,phiroict/docker,denverdino/docker.github.io,anweiss/docker.github.io,snrism/swarm,Spritekin/swarm,danix800/docker.github.io,raoofm/swarm,BSWANG/swarm,rillig/docker.github.io,alexisbellido/docker.github.io,rutulpatel/swarm,beni55/swarm-1,anweiss/docker.github.io,ealang/swarm,marsmensch/swarm,denverdino/docker.github.io,barais/swarm,errordeveloper/swarm,auzias/swarm,everett-toews/swarm,akerbis/armhf-swarm,SivagnanamCiena/swarm,jimmyxian/swarm,mountkin/swarm,menglingwei/denverdino.github.io,PeoplePerHour/libswarm,sanscontext/docker.github.io,bdwill/docker.github.io,BSWANG/denverdino.github.io,gradywang/swarm,echupriyanov/swarm,MHBauer/swarm,sanscontext/docker.github.io,doronp/swarm,alexisbellido/docker.github.io,bdwill/docker.github.io,francisbouvier/swarm,joeuo/docker.github.io,docker/docker.github.io,dnephin/swarm,kyhavlov/swarm,vlajos/swarm,anweiss/docker.github.io,srikalyan/swarm,xFragger/swarm,qianzhangxa/swarm,mavenugo/swarm,FollowMyDev/swarm,shahankhatch/swarm,qianzhangxa/swarm,rillig/docker.github.io,anweiss/docker.github.io,adouang/swarm,NunoEdgarGub1/swarm,alexisbellido/docker.github.io,auzias/swarm,mrjana/swarm,jimmycmh/swarm,srikalyan/swarm,LuisBosquez/docker.github.io,therealbill/swarm,pssahi/swarm,unodba/swarm,cpuguy83/swarm,shubheksha/docker.github.io,londoncalling/docker.github.io,polyverse-security/swarm,ejholmes/swarm,riuvshin/swarm,johnstep/docker.github.io,unodba/swarm,bdwill/docker.github.io,CiaranCostello/swarm,shakamunyi/swarm,morpheyesh/swarm,shubheksha/docker.github.io,FreedomWangLi/swarm,liubin/swarm,rav121/swarm,danix800/docker.github.io,londoncalling/docker.github.io,phiroict/docker,shin-/docker.github.io,troy0820/docker.github.io,CodeNow/swarm,ezrasilvera/swarm,therealbill/swarm,christophelec/swarm,joaofnfernandes/docker.github.io,krystism/swarm,ch3lo/swarm,denverdino/docker.github.io,joaofnfernandes/docker.github.io,mrjana/swarm,thaJeztah/docker.github.io,chanwit/swarm,BSWANG/denverdino.github.io,rancher/swarm,everett-toews/swarm,shot/swarm,megamsys/swarm,gdevillele/docker.github.io,tnachen/swarm,ezrasilvera/SwarmACLs,jdamick/swarm,docker-zh/docker.github.io,fugr/swarm,zkcrescent/swarm,Aorjoa/swarm,kunalkushwaha/swarm,jeffjen/swarm,londoncalling/docker.github.io,doronp/swarm,phiroict/docker,FollowMyDev/swarm,kunalkushwaha/swarm,LuisBosquez/docker.github.io,jay-lau/swarm,rajdeepd/swarm,danix800/docker.github.io,jimenez/swarm,allencloud/swarm,jzwlqx/denverdino.github.io,gdevillele/docker.github.io,docker-zh/docker.github.io,joaofnfernandes/docker.github.io,beni55/swarm-1,johnstep/docker.github.io,deis/swarm,iaintshine/swarm,tnachen/swarm,joeuo/docker.github.io,aduermael/docker.github.io,mgoelzer/swarm,docker-zh/docker.github.io,LukasBacigal/swarm,SivagnanamCiena/swarm,gradywang/swarm,dnephin/swarm,ejholmes/swarm,aidora/pisces,affo/swarm,rchicoli/swarm,docker/docker.github.io,polyverse-security/swarm,barais/swarm,francisbouvier/swarm,docker-zh/docker.github.io,rutulpatel/swarm,bdwill/docker.github.io,rchicoli/swarm,atlassian/swarm,vlajos/swarm,swarm-hooks/swarm,Spritekin/swarm,rajdeepd/swarm,shubheksha/docker.github.io,JimGalasyn/docker.github.io,cgvarela/swarm,resouer/swarm,docker-zh/docker.github.io,troy0820/docker.github.io,bpradipt/swarm,gdevillele/docker.github.io,christophelec/swarm,phiroict/docker,denverdino/denverdino.github.io,thaJeztah/docker.github.io,ezrasilvera/SwarmACLs,tranceitionalMynd/swarm,londoncalling/docker.github.io,sfsmithcha/swarm,EderRoger/swarm,Aorjoa/swarm,jimenez/swarm,BSWANG/denverdino.github.io,MHBauer/swarm,jdamick/swarm,FreedomWangLi/swarm,rancher/swarm,alexisbellido/docker.github.io,adouang/swarm,CodeNow/swarm,joaofnfernandes/docker.github.io,kyhavlov/swarm,jeffjen/swarm,joeuo/docker.github.io,menglingwei/denverdino.github.io,EderRoger/swarm,xFragger/swarm,docker/docker.github.io,riuvshin/swarm,jzwlqx/denverdino.github.io,anweiss/docker.github.io,CiaranCostello/swarm,resouer/swarm,jimmycmh/swarm,linecheng/swarm,menglingwei/denverdino.github.io,sanscontext/docker.github.io,iaintshine/swarm,ricca742/swarm,mavenugo/swarm,sfsmithcha/swarm,ehazlett/swarm,shubheksha/docker.github.io,thaJeztah/docker.github.io,ricca742/swarm,gdevillele/docker.github.io,jzwlqx/denverdino.github.io,gonkulator/swarm