Currently the entirety of the Comment Dialog lives inside of

RB.CommentDialogView. This patch will extract the internals of the

dialog, such as the text area and UI for checkboxes, and place them 

inside of RB.CommentPaneView.
So far I have rendered a new view inside of the original 

RB.CommentDialogView file, CommentPaneView, in order to get 

comfortable with Backbone Views. I plan on filling out this new view 

entirely before moving the Backbone view inside of a new file.