rvm:
  - 1.8.7
  - 1.9.2
  - ree
  - jruby
  - ruby-head
  - rbx-2.0

rvm:
  - 1.8.7
  - 1.9.2
  - ree
  - ruby-head
  - rbx-2.0

Remove support for 1.8.6 in Travis CI
Remove support for 1.8.6 in Travis CI

It's failing by not loading sqlite3's native extensions, and I don't
care about JRuby anyway.
