Made some small changes to the way power ups are created
Clicks are now registered for the power ups
Powerup now disappears when clicked
Removed logs and checked for powerup not null
Only one powerup at a time is available on the player's screen
Powerup now works locally (only bigger pole for now)
Shields are now drawn depending on length
Four power ups now work locally
Added revertShield powerup
Powerups revert states so only 1 powerup is active at a time
Timers for power ups are now started
Moved powerup timer checks to player
Merge branch 'first_powerup' into development

Conflicts:
	Paaltjesvoetbal/client/js/PlayerConnection.js
	Paaltjesvoetbal/game/Player.js
	Paaltjesvoetbal/game/util/UserSettings.js
	Paaltjesvoetbal/server/lib/ServerGame.js
	Paaltjesvoetbal/server/lib/Settings.js