Add contributor guidelines
Add contributor guidelines

This commit adds a CONTRIBUTING.md files that details the process for working with issues and pull-requests within this repo.  It also describes the process to use when reviewing others contributions

sigmavirus24/openstack-ansible,manuelfelipe/openstack-ansible,stackforge/os-ansible-deployment,pombredanne/os-ansible-deployment,mrda/openstack-ansible,os-cloud/os-ansible-deployment,jpmontez/os-ansible-deployment,BjoernT/openstack-ansible,sigmavirus24/os-ansible-deployment,openstack/openstack-ansible,major/openstack-ansible,mattt416/ansible-lxc-rpc,pombredanne/os-ansible-deployment,jpmontez/os-ansible-deployment,rcbops/ansible-lxc-rpc,antonym/openstack-ansible,major/os-ansible-deployment,git-harry/os-ansible-deployment,pombredanne/os-ansible-deployment,yanyao/newton,sacharya/os-ansible-deployment,miguelgrinberg/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,metral/os-ansible-deployment,jpmontez/os-ansible-deployment,mancdaz/openstack-ansible,bunchc/openstack-ansible,cloudnull/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,jpmontez/openstack-ansible,achekunov/openstack-ansible,dhanunjaya/os-ansible-deployment,BjoernT/os-ansible-deployment,sti-jans/openstack-ansible,sti-jans/openstack-ansible,git-harry/os-ansible-deployment,BjoernT/os-ansible-deployment,sigmavirus24/os-ansible-deployment,cfarquhar/openstack-ansible,open-switch/infra_openstack-ansible,weezer/openstack-ansible,yanyao/openstack-deployment,metral/os-ansible-deployment,stevelle/os-ansible-deployment,stevelle/openstack-ansible,VaneCloud/openstack-ansible,cfarquhar/openstack-ansible,rcbops/ansible-lxc-rpc,achekunov/openstack-ansible,yanyao/openstack-deployment-liberty,yanyao/openstack-ansible,antonym/openstack-ansible,wenhuizhang/os-ansible-deployment,VaneCloud/openstack-ansible,openstack/openstack-ansible,jpmontez/openstack-ansible,open-switch/infra_openstack-ansible,open-switch/infra_openstack-ansible,yanyao/newton,yanyao/openstack-deployment,rcbops/ansible-lxc-rpc,stevelle/openstack-ansible,hughsaunders/os-ansible-deployment,mrda/openstack-ansible,hughsaunders/openstack-ansible,hughsaunders/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,robb-romans/openstack-ansible,sacharya/os-ansible-deployment,git-harry/os-ansible-deployment,shane-c/openstack-ansible,stackforge/os-ansible-deployment,mrda/openstack-ansible,robb-romans/openstack-ansible,bunchc/openstack-ansible,manuelfelipe/openstack-ansible,antonym/openstack-ansible,BjoernT/openstack-ansible,d34dh0r53/os-ansible-deployment,dhanunjaya/os-ansible-deployment,shane-c/openstack-ansible,rcbops/ansible-lxc-rpc,BjoernT/os-ansible-deployment,VaneCloud/openstack-ansible,miguelgrinberg/os-ansible-deployment,hughsaunders/openstack-ansible,mattt416/ansible-lxc-rpc,Logan2211/openstack-ansible,mattt416/ansible-lxc-rpc,hughsaunders/os-ansible-deployment,Logan2211/openstack-ansible,sti-jans/openstack-ansible,sigmavirus24/openstack-ansible,major/os-ansible-deployment,hughsaunders/openstack-ansible,jpmontez/openstack-ansible,d34dh0r53/os-ansible-deployment,mancdaz/openstack-ansible,yanyao/openstack-deployment-liberty,hughsaunders/os-ansible-deployment,yanyao/openstack-deployment-liberty,yanyao/openstack-deployment,yanyao/openstack-ansible,major/openstack-ansible,yanyao/openstack-deployment,shane-c/openstack-ansible,manuelfelipe/openstack-ansible,mattt416/ansible-lxc-rpc,achekunov/openstack-ansible,cloudnull/os-ansible-deployment,stevelle/os-ansible-deployment,hughsaunders/openstack-ansible,os-cloud/os-ansible-deployment,wenhuizhang/os-ansible-deployment,weezer/openstack-ansible