Merge pull request #8 from jeffkynaston/game_controller

Game controller
Merge pull request #9 from jeffkynaston/game_controller

fixed redraw bug
fixed start screen scroll problem
fixes the player staying inbound, laser coming from the middle of the player
Merge branch 'master' into bug_fix
implement display game over
Merge pull request #10 from jeffkynaston/bug_fix

Bug fix
changed lazer speed, fixed laser dissappearing when invader is dead
Merge branch 'master' into game_controller

Conflicts:
	laser.js
adds movement to the invader
Merge branch 'master' into bug_fix
Merge pull request #11 from jeffkynaston/styling

Styling
Merge branch 'master' into bug_fix
changed laser speed to 4
add functionality to end game
Merge pull request #12 from jeffkynaston/styling

Styling
Merge branch 'master' into bug_fix
Merge branch 'master' into game_controller
Merge pull request #13 from jeffkynaston/bug_fix

Bug fix
Merge branch 'master' into game_controller