Instructions for contributing new preferences.
Instructions for migrating from Pivotal-Preferences-RubyMine
Update README.md
Merge pull request #2 from TiraO/patch-1

clarify command instructions in readme
Adds ginkgo and Idea support
Renamed "idea" ide to "intellijcommunity". Dry'ed up configs.
Adding Gingkgo Live Templates + IntelliJ Community Edition Support
Add Pivotal Tracker keymap and set as RubyMine default