Pre-submission polishings!

+ Added a progress animation.
    - Runs for, like, 0.6 or something, every time the main table
controller comes into view.
    - Also hides all of the entries. This makes stuff look nice if
you’re switching between users.
    - MBProgressHUD is nice.
+ Adding username to navigation controller title. Changes with user.
Etc.
+ Made font for text posts bigger and bolder.