Ryan/testing comment link

Refined the entire commenting features. 

* Cleaned up some unneeded db columns
* Removed unneeded fields from new comment form
* Changed team field to a selection box restricted to only the teams playing in that game
* Auto associate new comments to the correct game
* Add new comment field to the game page
* Reformatted the way existing comments are displayed on the game page
* Restructured routes to associate comments to games
* Changed rank comment to default to zero