Tests: add git config settings
Tests: change git command order
Tests: set git user
Tests: remove oj, to fix travis/jruby
Tests: skip quality rake task, if not present
Tests: remove JRuby since we have a native libs
Docs: add Travis badge to readme
Tests: use Ruby 2.0 on travis-ci
Tests: allow Ruby 2.0 failure for now

Ruby 2.0.0 does not automatically gunzip the net/http response, a
possible solution is:

https://github.com/sferik/twitter/issues/473
Tests: add Code Climate badge, 3.9 gpa atm