Handle git gems by cloning repo to local one, rewriting Gemfile
urls and sending both repos and gems in source packages.
Separate doc dir w licensec.
Gemfile, Gemfile.lock now lives in bundle, linked to application.
Rewrite http git urls to git: to make it uniform & simpler
Adding a docs dir collexting README and licenses from contained gems.
git gems, which bundler does not handle well today, are handled
by a hacked parsing of Gemfile.log, gem built into the source
bundle and installed on target system
