Add delete and update glyphicons to comments
Move Comment logic to a CommentController class
Delete a Comment when the trash icon is pressed
Add script to demonstrate that there's zero security yet
Edit comments when the pencil is pressed
Actually edit comments instead of making new ones

Oops!
Unify the save comment buttons' styles
Merge branch 'UD'

This completes the update & delete portions of CRUD (with create having
been the first one implemented).