Jdmundrawala/11 stable bash

@adamedx @schisamo @sersut @randomcamel 
Take a look please. There will be one change (working on it after I kick off a build), and that is the repo name. It will be msys-bash.
If we use a more standard extension this file will automatically be expanded for you:
https://github.com/opscode/omnibus/blob/3.0-stable/lib/omnibus/fetchers/net_fetcher.rb#L37
https://github.com/opscode/omnibus/blob/3.0-stable/lib/omnibus/fetchers/net_fetcher.rb#L208-L212