Incorporated Basic Pixel Collision.
Implemented Shield for Player.

Fixed Astroid bug.
Fixed a Projectile bug.

Projectile was only being deactivated if travelling right.
Improved Shield Regeneration.
Implemented Game Over.

For now Game Over goes back to start menu.
Edited Ship XML File

Reduced PS_Old Gum's Shield.
Fixed a bug in GuiLifeBar.

Was not scaling the texture right.
Implemented Damage if Player collides with a Ship.

Improved the way the system handles damage.
Minor Rebalancing.

Changed the values of Shield and Score of the current enemies to better
reflect the new damage system.
Fixed Player Score and Flamoca not resetting.
Fixed Spawn Manager not resetting properly.
Fixed a spelling error in a class's name.
Fixed a spelling error in a few sprites.
Fixed a spelling error in a few Variables.
Fixed the last of the Variables spelling errors.

And a few methods.
Added Levi Challenge Editor Reference.
Merge pull request #3 from Spikky577/GUI-HUD

Forgot to change the branch to commit to, so ended up committing back to GII-HUD without realising.