rvm:
  - ruby-head
  - 1.9.2
  - 1.8.7
  - ree
  - jruby
  - rbx
  - rbx-2.0.0pre
rvm:
  - 2.1.5
  - 2.0.0
  - jruby

Reduce rubies on Travis CI
Reduce rubies on Travis CI

Only run this on 2.1, 2.0 and jruby.
