Added a preliminary Committer's Guide.
Added a preliminary Committer's Guide.

craimbert/mesos,jpeach/mesos,neilconway/mesos,asamerh4/mesos,chhsia0/mesos,abudnik/mesos,dforsyth/mesos,reneploetz/mesos,Aman-Jain-14/customizedMesos,Gilbert88/mesos,chhsia0/mesos,zmalik/mesos,gsantovena/mesos,yuquanshan/customizedMesos,verizonlabs/mesos,jpeach/mesos,Aman-Jain-14/customizedMesos,zmalik/mesos,craimbert/mesos,yuquanshan/customizedMesos,dforsyth/mesos,andschwa/mesos,neilconway/mesos,verizonlabs/mesos,asamerh4/mesos,gsantovena/mesos,neilconway/mesos,dforsyth/mesos,andschwa/mesos,gsantovena/mesos,neilconway/mesos,asamerh4/mesos,reneploetz/mesos,reneploetz/mesos,craimbert/mesos,andschwa/mesos,Gilbert88/mesos,reneploetz/mesos,asamerh4/mesos,jpeach/mesos,craimbert/mesos,neilconway/mesos,Gilbert88/mesos,reneploetz/mesos,asamerh4/mesos,dforsyth/mesos,neilconway/mesos,abudnik/mesos,jpeach/mesos,gsantovena/mesos,Gilbert88/mesos,kaysoky/mesos,abudnik/mesos,zmalik/mesos,dforsyth/mesos,andschwa/mesos,verizonlabs/mesos,dforsyth/mesos,yuquanshan/customizedMesos,zmalik/mesos,gsantovena/mesos,zmalik/mesos,kaysoky/mesos,gsantovena/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,kaysoky/mesos,abudnik/mesos,verizonlabs/mesos,reneploetz/mesos,yuquanshan/customizedMesos,abudnik/mesos,kaysoky/mesos,Gilbert88/mesos,Aman-Jain-14/customizedMesos,verizonlabs/mesos,Gilbert88/mesos,zmalik/mesos,abudnik/mesos,chhsia0/mesos,abudnik/mesos,chhsia0/mesos,chhsia0/mesos,kaysoky/mesos,kaysoky/mesos,jpeach/mesos,verizonlabs/mesos,chhsia0/mesos,asamerh4/mesos,asamerh4/mesos,dforsyth/mesos,yuquanshan/customizedMesos,reneploetz/mesos,Aman-Jain-14/customizedMesos,andschwa/mesos,jpeach/mesos,Gilbert88/mesos,yuquanshan/customizedMesos,zmalik/mesos,craimbert/mesos,andschwa/mesos,Aman-Jain-14/customizedMesos,verizonlabs/mesos,andschwa/mesos,kaysoky/mesos,chhsia0/mesos,yuquanshan/customizedMesos,gsantovena/mesos,craimbert/mesos,craimbert/mesos,Aman-Jain-14/customizedMesos,jpeach/mesos