Adds release notes for upcoming 1.6 release
Adds release notes for upcoming 1.6 release

Signed-off-by: Fred Lifton <35b26e57a7175ee66faace4808445bd5b2274034@docker.com>

exoscale/docker-machine,shin-/docker.github.io,jmelis/machine,Qwinix/docker-machine-vmware,mjhea0/machine,justintung/machine,joeuo/docker.github.io,alexisbellido/docker.github.io,mjtrefethen/machine,vovimayhem/machine,carloreggiani/machine,menglingwei/machine,joeuo/docker.github.io,bfirsh/machine,juliengarcia/machine,wenlock/machine,clintonskitson/machine,yanzay/machine,dmp42/machine,sjfloat/machine,hironobu-s/machine,sjfloat/machine,atsaki/machine-2,dweomer/docker-machine,skatsuta/machine,jzwlqx/denverdino.github.io,londoncalling/docker.github.io,ravolt/docker-machine,chantra/machine,voutilad/machine,phiroict/docker,kacole2/machine,cgvarela/machine,slowteetoe/machine,Parallels/docker-machine,jeffellin/machine,docker/machine,dudymas/machine,NeilW/machine,wzymaster/machine,duglin/machine,zchee/machine,unodba/machine,pdxjohnny/machine,wlan0/machine,atsaki/machine,jeanlaurent/machine,euank/machine,pottava/machine,ksasi/machine,hironobu-s/machine,aduermael/docker.github.io,bdwill/docker.github.io,thaJeztah/machine,denverdino/machine-1,shin-/docker.github.io,xiaohui/machine,denverdino/docker.github.io,thaJeztah/docker.github.io,bgokden/machine,StackPointCloud/machine,moxiegirl/machine,rawkode/machine,pdxjohnny/machine,docker/docker.github.io,thaJeztah/docker.github.io,jhoos/machine,deitch/machine,bdwill/docker.github.io,skippbox/kmachine,otherjason/machine,cab105/machine,londoncalling/docker.github.io,BSWANG/denverdino.github.io,tyrken/machine,docker/docker.github.io,menglingwei/denverdino.github.io,aduermael/docker.github.io,troy0820/docker.github.io,anweiss/docker.github.io,jasisk/machine,dgageot/machine,laveolu/machine,CenturyLinkLabs/machine,phiroict/docker,jkingyens/machine,robertbreker/machine,johnstep/docker.github.io,jarosser06/machine,ubiquityhosting/machine,jarosser06/machine,BSWANG/denverdino.github.io,mjtrefethen/machine,s7v7nislands/machine,menglingwei/denverdino.github.io,steeve/machine,allingeek/machine,kechol/machine,aduermael/docker.github.io,jlusiardi/machine,troy0820/docker.github.io,phiroict/docker,rillig/docker.github.io,ibuildthecloud/machine,jzwlqx/denverdino.github.io,carolynvs/machine,ppadala/machine,joelea/machine,denverdino/machine-1,menglingwei/denverdino.github.io,sanscontext/docker.github.io,docker-zh/docker.github.io,shubheksha/docker.github.io,menglingwei/denverdino.github.io,robertbreker/machine,jhoos/machine,gerred/machine,nunofgs/docker-machine,blueyed/machine,bookerzzz/machine,j3tm0t0/machine,paultag/machine,gdevillele/docker.github.io,gerred/machine,errordeveloper/machine,zchee/machine,JimGalasyn/docker.github.io,ekristen/machine,LaynePeng/machine,joeuo/docker.github.io,dnephin/machine,jzwlqx/denverdino.github.io,anweiss/docker.github.io,alexisbellido/docker.github.io,trecloux/machine,brandoncc/machine,shin-/docker.github.io,sausheong/machine,troy0820/docker.github.io,bdwill/docker.github.io,s7v7nislands/machine,ehazlett/machine,sebadiaz/machine,steeve/machine,johnstep/docker.github.io,rdgreis/machine,rwilliams/machine,davidstosik/machine,dskora/machine,rdgreis/machine,voutilad/machine,yanzay/machine,moxiegirl/machine,beni55/machine,StackPointCloud/machine,tpires/machine,danix800/docker.github.io,evq/machine,euank/machine,akolpakov/machine,dudymas/machine,wenlock/machine,surgeforward/machine,wzymaster/machine,aperepel/machine,denmat/machine,titanlien/machine,anweiss/docker.github.io,carolynvs/machine,phiroict/docker,trecloux/machine,joaofnfernandes/docker.github.io,denverdino/docker.github.io,Kast0rTr0y/docker-machine,joaofnfernandes/docker.github.io,dmp42/machine,allingeek/machine,johnstep/docker.github.io,menglingwei/machine,LuisBosquez/docker.github.io,mjhea0/machine,JohnKDay/machine,aduermael/docker.github.io,jasisk/machine,Kast0rTr0y/docker-machine,binario200/machine,vovimayhem/machine,csakoda/machine,denverdino/denverdino.github.io,robinbb/machine,yut148/machine,zchee/machine,tpires/machine,cgvarela/machine,wenlock/machine,soleo/machine,sebadiaz/machine,denverdino/docker.github.io,jpressnell/machine,NeilW/machine,bookerzzz/machine,CenturyLinkLabs/machine,zehicle/machine,legal90/machine,alexisbellido/docker.github.io,rowancarr/machine,menglingwei/machine,xiaohui/machine,Herbis/machine,dskora/machine,databus23/machine,blueyed/machine,faijaz/docker-machine,bwahn/machine,pragkent/machine,robinbb/machine,joelea/machine,larsla/machine,BSWANG/denverdino.github.io,aperepel/machine,skippbox/kmachine,davidstosik/machine,alexisbellido/docker.github.io,sausheong/machine,xinxian0458/machine,miqui/machine,soleo/machine,erikdejonge/machine,sanscontext/docker.github.io,trecloux/machine,juliengarcia/machine,wlan0/machine,jeanlaurent/machine,LuisBosquez/docker.github.io,paultag/machine,pottava/machine,allingeek/machine,bdwill/docker.github.io,dudymas/machine,databus23/machine,jpressnell/machine,emsi/machine,legal90/machine,jgsqware/machine,shubheksha/docker.github.io,bgokden/machine,abstractitptyltd/machine,otherjason/machine,asalhamed/machine,londoncalling/machine,robertbreker/machine,schatt/machine,ravolt/docker-machine,phiroict/docker,xinxian0458/machine,LuisBosquez/docker.github.io,imikushin/machine,pragkent/machine,xinxian0458/machine,Grynn/machine,TrumanLing/machine,robvanmieghem/machine,docker-zh/docker.github.io,soleo/machine,seegno-forks/machine,moxiegirl/machine,crunchywelch/machine,ekristen/machine,bwahn/machine,rupakg/machine,robvanmieghem/machine,Parallels/docker-machine,sjfloat/machine,frapposelli/machine,skatsuta/machine,shin-/docker.github.io,denverdino/denverdino.github.io,ocean/machine,anweiss/docker.github.io,denverdino/machine,deitch/machine,zehicle/machine,usmanismail/machine,rupakg/machine,cvstebut/machine,exoscale/docker-machine,bwahn/machine,danix800/docker.github.io,vovimayhem/machine,pottava/machine,docker/docker.github.io,rillig/docker.github.io,joaofnfernandes/docker.github.io,miqui/machine,danix800/docker.github.io,cvstebut/machine,tpires/machine,NeilW/machine,feelobot/machine,carolynvs/machine,londoncalling/machine,ppadala/machine,marsmensch/machine,ubiquityhosting/machine,usmanismail/machine,joeuo/docker.github.io,docker-zh/docker.github.io,justintung/machine,13W/machine,jlusiardi/machine,beni55/machine,faijaz/docker-machine,rillig/docker.github.io,surgeforward/machine,MHBauer/machine,rwilliams/machine,cab105/machine,ibuildthecloud/machine,JimGalasyn/docker.github.io,13W/machine,yut148/machine,JohnKDay/machine,binario200/machine,johnstep/docker.github.io,sanscontext/docker.github.io,dnephin/machine,ksasi/machine,ddaze/machine,kechol/machine,anweiss/docker.github.io,jeffellin/machine,StackPointCloud/machine,kacole2/machine,joyent/machine,anshulr/machine,wlan0/machine,atsaki/machine,MHBauer/machine,slashk/machine,docker/machine,docker-zh/docker.github.io,thaJeztah/docker.github.io,shubheksha/docker.github.io,hypriot/machine,jeffellin/machine,jkingyens/machine,shubheksha/docker.github.io,ggiamarchi/machine,rillig/docker.github.io,docker/docker.github.io,jzwlqx/denverdino.github.io,tyrken/machine,jeanlaurent/machine,titanlien/machine,beni55/machine,denverdino/machine,menglingwei/denverdino.github.io,rowancarr/machine,kacole2/machine,atsaki/machine-2,alindeman/machine,amylindburg/machine,flavio/machine,jsirois/machine,davidstosik/machine,miqui/machine,shubheksha/docker.github.io,londoncalling/docker.github.io,joaofnfernandes/docker.github.io,docker/docker.github.io,LaynePeng/machine,anshulr/machine,frapposelli/machine,flavio/machine,cab105/machine,denverdino/machine,gdevillele/docker.github.io,sanscontext/docker.github.io,joyent/machine,askb/machine,yanzay/machine,kunalkushwaha/machine,schatt/machine,feelobot/machine,rawkode/machine,jhoos/machine,carloreggiani/machine,marsmensch/machine,imikushin/machine,SvenDowideit/machine,robvanmieghem/machine,Grynn/machine,dweomer/docker-machine,dgageot/machine,clintonskitson/machine,jlusiardi/machine,thaJeztah/machine,csakoda/machine,denverdino/docker.github.io,usmanismail/machine,OpenNebula/machine,ksasi/machine,jzwlqx/denverdino.github.io,kunalkushwaha/machine,nunofgs/docker-machine,jgsqware/machine,rowancarr/machine,Grynn/machine,crunchywelch/machine,denverdino/docker.github.io,slashk/machine,asalhamed/machine,mark-adams/machine,BSWANG/denverdino.github.io,bgokden/machine,OpenNebula/machine,thaJeztah/machine,bookerzzz/machine,docker-zh/docker.github.io,mark-adams/machine,jgsqware/machine,bfirsh/machine,seegno-forks/machine,evq/machine,ppadala/machine,JimGalasyn/docker.github.io,alindeman/machine,TrumanLing/machine,brandoncc/machine,tyrken/machine,otherjason/machine,abstractitptyltd/machine,hironobu-s/machine,denmat/machine,shot/machine,thaJeztah/docker.github.io,juliengarcia/machine,alexisbellido/docker.github.io,Herbis/machine,shot/machine,londoncalling/docker.github.io,ggiamarchi/machine,OpenNebula/machine,cpuguy83/machine,larsla/machine,amylindburg/machine,cpuguy83/machine,thaJeztah/docker.github.io,shot/machine,slowteetoe/machine,errordeveloper/machine,bdwill/docker.github.io,rwilliams/machine,gdevillele/docker.github.io,gdevillele/docker.github.io,jsirois/machine,ocean/machine,kunalkushwaha/machine,pragkent/machine,jmelis/machine,j3tm0t0/machine,londoncalling/docker.github.io,joeuo/docker.github.io,wzymaster/machine,gerred/machine,ddaze/machine,pdxjohnny/machine,jmelis/machine,sanscontext/docker.github.io,denverdino/denverdino.github.io,whilp/machine,erikdejonge/machine,hypriot/machine,BSWANG/denverdino.github.io,ubiquityhosting/machine,unodba/machine,cvstebut/machine,errordeveloper/machine,ehazlett/machine,Qwinix/docker-machine-vmware,johnstep/docker.github.io,faijaz/docker-machine,atsaki/machine,databus23/machine,askb/machine,JimGalasyn/docker.github.io,titanlien/machine,LuisBosquez/docker.github.io,askb/machine,xiaohui/machine,denverdino/denverdino.github.io,whilp/machine,sebadiaz/machine,denverdino/denverdino.github.io,akolpakov/machine,skatsuta/machine,jkingyens/machine,JohnKDay/machine,shin-/docker.github.io,jsirois/machine,emsi/machine,chantra/machine,SvenDowideit/machine,gdevillele/docker.github.io,LuisBosquez/docker.github.io,JimGalasyn/docker.github.io,danix800/docker.github.io,troy0820/docker.github.io,joaofnfernandes/docker.github.io,laveolu/machine,duglin/machine