Fix Travis Config

[jonahgeorge]

https://travis-ci.org/protoscend/protoscend/builds/177714725

$ bundle install --jobs=3 --retry=3 --deployment
Your Ruby version is 1.9.3, but your Gemfile specified 2.3.0
The command "eval bundle install --jobs=3 --retry=3 --deployment" failed. Retrying, 2 of 3.
Your Ruby version is 1.9.3, but your Gemfile specified 2.3.0
The command "eval bundle install --jobs=3 --retry=3 --deployment" failed. Retrying, 3 of 3.
Your Ruby version is 1.9.3, but your Gemfile specified 2.3.0
The command "eval bundle install --jobs=3 --retry=3 --deployment" failed 3 times.
The command "bundle install --jobs=3 --retry=3 --deployment" failed and exited with 18 during .
Your build has been stopped.