Added readme about contributing to the project

Added information about forking, pull requests, branching purposes and
suchfuls.
Merge pull request #522 from claco/contributing

Added readme about contributing to the project
Fix spacing issues
Fix spelling derp
Auto Updating glance submodule
Auto Updating openstack-monitoring submodule
Auto Updating openstack-logging submodule
Adjust example environment files
Merge pull request #526 from andymcc/example_env

Adjust example environment files
Auto Updating ceilometer submodule
Auto Updating modules submodule
Auto Updating modules submodule
Auto Updating apt submodule
Auto Updating ntp submodule
Auto Updating openstack-monitoring submodule
Merge pull request #523 from claco/contributing

Fix spacing issues
Auto Updating nova-network submodule
Auto Updating mysql-openstack submodule
Auto Updating rabbitmq-openstack submodule
sync rabbitmq to rcbops instead of opscode for clustering