Upgrade Ruby to use 2.1.5.
Ignore generated Intellij files.
Update the readme further.
Merge pull request #14 from coursemology-collab/lowjoel/remove-generated-intellij-files

Ignore generated IntelliJ files.
Merge pull request #13 from coursemology-collab/lowjoel/upgrade-ruby-for-travis

Upgrade Ruby to use 2.1.5 on Travis.
Merge pull request #15 from coursemology-collab/lowjoel/update-readme

Update the readme further.
Add CONTRIBUTING.md
Fix Travis integration config option in .coveralls.yml.

"Another important option is service_name which allows you to specify where Coveralls should look to find additional information about your builds. This can be any string, but using travis-ci or travis-pro will allow Coveralls to fetch branch data, comment on pull requests, and more."
Add MIT license.
Merge pull request #17 from coursemology-collab/lowjoel/fix-coveralls-travis-config

Fix Travis integration config option in .coveralls.yml.
Merge pull request #16 from jsyeo/jsyeo-contributing

Add CONTRIBUTING.md
Merge pull request #18 from jsyeo/jsyeo-license

Add MIT license