Major Update

Because I forgot to commit for a while, there are many changes:
Add black hole
Add minimize
Add portal
Add missile
Fix bug where only one projectile can be fired
Add info text
Add settings
Remove comments
Fix other bugs
Add Lazer and Speed Boost

Add Lazer and Speed Boost
Most of changes appear because of minor changes to virtual function
parameters
Add Tripler and Fix Bug

Add Tripler and fix bug where after a black hole, bullets shoot in
random directions
Add Menus

Add PauseMenu and Menu class as well as change GameEntity Draw
Function to move LayerDepth backwards for the menus to fit