Adding support for rabbitmq-env.conf
Adding an entry in defaults/main for rabbitmq-env.conf support.
Adding support for non-default nodes
Fixing whitespace.
Remove rabbitmq_env by detecting if rabbitmq_conf_env is defined or not
Update the README to match the last variable change
Merge branch 'pr_8'

Conflicts:
	vars/test.yml
Add a section about installation and versionning in the README