Adds a static status layer to the top of the Game.
Ensure that our hero only runs along the ground.

Fixes #22
Added collision detection to trigger game over.

Fixes #23.
Deleted files accidentally added in commit 6af3e84.
Change the collisions vector to be a pointer for performance reasons.
Update README.md
Finish localising.

Fixes #17.
Adds some temporary graphics #10 and #11
Replace the projectile images to match theme.
Adds color BG to game layer (#39)
Adds blue background to remaining scenes.

Closes #39
Changes text colours to better suit bg

Closes #40
Adds a constants file, starts to implement styling constants.

Towards #16
Styling constants.

Closes #16.
Moved a few more things to constants.
Merging master branch into twintegration branch