Archlinux support added

only change needed service_name needed to be a variable across
distributions

rabbitmq_spec.rb needs to be refactored archlinux needs it
own testing...
updated spec file for archlinux
changed service to a named variable service
because of archlinux change in service name
Merge pull request #107 from aboe76/archlinux-support

Archlinux support added
Fix README.md
Merge pull request #124 from phyw/master

Fix README.md
Fix license file.
Merge pull request #127 from apenney/license

Fix license file.