Make it work in Ruby 2.0

Seems to be a regex bug where \Z fucks up
Add Ruby 2.0.0 to CI
Uhm, change :rubygems to http://rubygems.org in Gemfile

IDK why, but it's whining at me if I don't. Something about security or
whatever. My understanding was you shouldn't use :rubygems b/c it went
to http://rubygems.org, so you should use https, but my https doesn't
work, and it recommends http://rubygems.org for that case... which won't
update itself or raise a warning if it ever gets fixed, so maybe I just
don't get it, but this at least makes it stop complaining.
Bump version to 0.0.14