Add a alchemy:release Rake task
Add a alchemy:release Rake task

This helps to publish new gem and package versions in one
command. This command also checks if the versions are in sync.
It aborts otherwise.

AlchemyCMS/alchemy_cms,robinboening/alchemy_cms,AlchemyCMS/alchemy_cms,robinboening/alchemy_cms,AlchemyCMS/alchemy_cms,robinboening/alchemy_cms