Start of User Avatar System

-Users can now upload a user avatar in edit profile.
-Max Width: 1024 Max Height: 768
-As of right now, no errors are displayed if the upload failed
-Must import latest database file or do the following:
Add avatar column to users table.
Type: VARCHAR
Limit: 50
default: assets/img/user-default.png
Merge branch 'development' of https://github.com/UNTVote/UNTVote into development