GUI Fixes and Death Menu implemented

Press 'L' to kill yourself (temporary, for testing purposes)

Death Menu is functional and working. Works just like the Pause Menu.

The GUI has been setup to be more dynamic and work on multiple
resolution setups. Deleted the old prefab method, now they are just
scripts that extend the Main Camera, like the menus.

To Do List:
Dim display on Pause/Death menus
Make Main Menu
Format 'Controls' section