implemented `docker ps`
implemented `docker ps`

Docker-DCO-1.1-Signed-off-by: Aaron Feng <aaron.feng@gmail.com> (github: aaronfeng)

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