Adjusted the relationship between users and discussions
Fixed a typo
Added discussion.js to manage UI and AJAX requests for comments
Merged the discussion index and the new comment button into a single view
Fixed issues with indicies
The model to which we attach a comment/discussion is now passed as a data-* attrubte and/or and argument to the required JS function
Moved Ajax triggers away from the elements and into a script
A little clean up
A little clean up