enhance to support installation via bash_installer on other Linux variants

This patch enhances the cookbook to fall back to the bash installer when not on Debian or Ubuntu.  I split the functionality out into two recipes in case people want to choose explicitly and made the default recipe fork so that it should be backwards compatible with the old version.

I also added a Berksfile and metadata, as you didn't have any.  Feel free to replace the default 0.1.0 with whatever the real release should be.

Cheers