rvm:
  - 1.8.7
  - 1.9.2
  - rbx
  - ree
  - jruby
rvm:
  - 1.9.3
#  - rbx-19mode # not until rbx bug #1692 is resolved
  - jruby-19mode

Drop support for old rubies.
Drop support for old rubies.

Rails will not support < 1.9.3 at Rails 4, so neither should we.
