* Added new artifact types.  Full list of those now supported:
    * DE - Defect
    * DS - Defect suite
    * F - Feature
    * I - Initiative
    * T - Theme
    * TA - Task
    * TC - Test case
    * US - user story
* Refactored to be data driven
Merge pull request #976 from robertfwest/rally_updates

Added new artifact types to Rally plugin