[FEATURE] Add before_install git submodule update (http://about.travis-ci.org/docs/user/build-configuration/#Updating-Git-Submodules)
[BUGFIX] Use public Git URL for GIT submodule (http://about.travis-ci.org/docs/user/build-configuration/#Use-Public-URLs-For-Submodules).
Merge pull request #4 from braingourmets/travis-submodule
[BUGFIX] Add Rake to the Gemfile.
Merge pull request #5 from braingourmets/rake

[BUGFIX] Add Rake to the Gemfile.
Merge branch 'master' into gem-files