Add ruby 2.2.1 to travis. 2.3.0 fails on test_push_and_pull.
Add ruby 2.2.1 to travis. 2.3.0 fails on test_push_and_pull.

jhominal/gollum-lib,gollum/gollum-lib,jhominal/gollum-lib,repotag/gollum-lib,gollum/gollum-lib,repotag/gollum-lib,rgroux/gollum-lib,rgroux/gollum-lib