Rails Backend v0.1

Includes Sparks, Ideas and Users, along with their linker tables
Rails Backend v0.2

Includes Comments, Tags and Tag_Linkers.  They are untested, but I
believe they should work.
Fixed tag relationships, enabled access through spark.tags, idea.tags, and tag.sparks, tag.ideas.
Implemented API versioning
Removed tag_linkers from API, should be implemented in the creation of a spark or idea, added user association to Comment model.
Added creation and addition of sparks on create of sparks/ideas
Fixed bug which didn't allow existing tags to be added to a new idea.
Added validations to models, including email validation.
Tweaking Gemfile to push up to Heroku
Tweaking Gemfile to push up to Heroku (again)
Tweaking Gemfile to push up to Heroku (once more)
Updating .gitignore to upload to Heroku