Update Swarm doc
Update Swarm doc

- Co-scheduling will now work, so we can remove the stuff about
  `volumes_from` and `net` and manual affinity filters.

- Added a section about building.

Signed-off-by: Aanand Prasad <94fc4f3e3d0be608b3ed7b8529ff28d2a445cce1@gmail.com>

bdwill/docker.github.io,joeuo/docker.github.io,LuisBosquez/docker.github.io,thieman/compose,alexandrev/compose,talolard/compose,thaJeztah/docker.github.io,johnstep/docker.github.io,alexandrev/compose,thaJeztah/compose,genki/compose,docker/docker.github.io,brunocascio/compose,JimGalasyn/docker.github.io,GM-Alex/compose,docker/docker.github.io,moxiegirl/compose,philwrenn/compose,ionrock/compose,runcom/compose,jzwlqx/denverdino.github.io,mbailey/compose,ain/compose,phiroict/docker,mark-adams/compose,shin-/docker.github.io,sanscontext/docker.github.io,danix800/docker.github.io,phiroict/docker,sebglazebrook/compose,mrfuxi/compose,hoogenm/compose,joaofnfernandes/docker.github.io,troy0820/docker.github.io,shin-/docker.github.io,rgbkrk/compose,j-fuentes/compose,BSWANG/denverdino.github.io,mnowster/compose,shin-/compose,jonaseck2/compose,dbdd4us/compose,anweiss/docker.github.io,albers/compose,mohitsoni/compose,qzio/compose,alexisbellido/docker.github.io,ChrisChinchilla/compose,bbirand/compose,Yelp/docker-compose,mindaugasrukas/compose,alexisbellido/docker.github.io,mnuessler/compose,alunduil/fig,browning/compose,d2bit/compose,alexisbellido/docker.github.io,denverdino/compose,dilgerma/compose,pspierce/compose,vdemeester/compose,Katlean/fig,phiroict/docker,bobphill/compose,jrabbit/compose,talolard/compose,funkyfuture/docker-compose,denverdino/compose,shubheksha/docker.github.io,DoubleMalt/compose,noironetworks/compose,rgbkrk/compose,vlajos/compose,nerro/compose,michael-k/docker-compose,cgvarela/compose,Dakno/compose,viranch/compose,unodba/compose,londoncalling/docker.github.io,denverdino/denverdino.github.io,LuisBosquez/docker.github.io,danix800/docker.github.io,ekristen/compose,jonaseck2/compose,uvgroovy/compose,BSWANG/denverdino.github.io,aduermael/docker.github.io,charleswhchan/compose,denverdino/docker.github.io,vlajos/compose,xydinesh/compose,joaofnfernandes/docker.github.io,denverdino/docker.github.io,joeuo/docker.github.io,dopry/compose,mosquito/docker-compose,josephpage/compose,sebglazebrook/compose,johnstep/docker.github.io,tiry/compose,tangkun75/compose,JimGalasyn/docker.github.io,nhumrich/compose,KalleDK/compose,menglingwei/denverdino.github.io,menglingwei/denverdino.github.io,mohitsoni/compose,gdevillele/docker.github.io,calou/compose,kojiromike/compose,TomasTomecek/compose,funkyfuture/docker-compose,simonista/compose,browning/compose,docker/docker.github.io,artemkaint/compose,GM-Alex/compose,BSWANG/denverdino.github.io,VinceBarresi/compose,JimGalasyn/docker.github.io,joeuo/docker.github.io,jzwlqx/denverdino.github.io,johnstep/docker.github.io,mosquito/docker-compose,saada/compose,jorgeLuizChaves/compose,saada/compose,denverdino/docker.github.io,bdwill/docker.github.io,artemkaint/compose,rillig/docker.github.io,sdurrheimer/compose,aanand/fig,lukemarsden/compose,gdevillele/docker.github.io,docker-zh/docker.github.io,BSWANG/denverdino.github.io,jiekechoo/compose,LuisBosquez/docker.github.io,londoncalling/docker.github.io,mdaue/compose,MSakamaki/compose,screwgoth/compose,mchasal/compose,aduermael/docker.github.io,sanscontext/docker.github.io,Chouser/compose,pspierce/compose,troy0820/docker.github.io,thaJeztah/docker.github.io,sdurrheimer/compose,au-phiware/compose,shubheksha/docker.github.io,noironetworks/compose,zhangspook/compose,glogiotatidis/compose,phiroict/docker,kikkomep/compose,denverdino/denverdino.github.io,zhangspook/compose,joaofnfernandes/docker.github.io,denverdino/denverdino.github.io,gdevillele/docker.github.io,uvgroovy/compose,moxiegirl/compose,alexisbellido/docker.github.io,dopry/compose,jgrowl/compose,joaofnfernandes/docker.github.io,bsmr-docker/compose,albers/compose,michael-k/docker-compose,philwrenn/compose,schmunk42/compose,tpounds/compose,goloveychuk/compose,jzwlqx/denverdino.github.io,kikkomep/compose,denverdino/docker.github.io,TomasTomecek/compose,iamluc/compose,denverdino/denverdino.github.io,RobertNorthard/compose,sanscontext/docker.github.io,alexisbellido/docker.github.io,Chouser/compose,bdwill/docker.github.io,calou/compose,joeuo/docker.github.io,screwgoth/compose,danix800/docker.github.io,mark-adams/compose,shin-/compose,dockerhn/compose,mdaue/compose,sanscontext/docker.github.io,simonista/compose,bsmr-docker/compose,troy0820/docker.github.io,rillig/docker.github.io,ZJaffee/compose,shubheksha/docker.github.io,docker/docker.github.io,bfirsh/fig,RobertNorthard/compose,rillig/docker.github.io,dilgerma/compose,glogiotatidis/compose,KalleDK/compose,danix800/docker.github.io,phiroict/docker,shin-/docker.github.io,jorgeLuizChaves/compose,runcom/compose,josephpage/compose,rstacruz/compose,mnuessler/compose,joeuo/docker.github.io,docker-zh/docker.github.io,ChrisChinchilla/compose,marcusmartins/compose,qzio/compose,rillig/docker.github.io,docker-zh/docker.github.io,bfirsh/fig,jessekl/compose,BSWANG/denverdino.github.io,menglingwei/denverdino.github.io,londoncalling/docker.github.io,charleswhchan/compose,ZJaffee/compose,shubheksha/docker.github.io,joaofnfernandes/docker.github.io,au-phiwa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