community_plugins recipe

This recipe downloads, installs and enables community plugins.
Fixing the linting in community_plugins.rb
Merge remote-tracking branch 'rabbitmq/master'
Merge branch 'master' into community_plugins
Merge remote-tracking branch 'rabbitmq/master'
Merge branch 'master' into community_plugins
Default spec for the community_plugins recipe
Merge pull request #161 from zahpee/community_plugins

Community plugins