merging updates from master
Merge branch 'master' of https://github.com/znagler/flashforward
merging up to date master
Merge branch 'master' of https://github.com/znagler/flashforward
add ceiling to game area so user cannot pass through into the flashcard game area
fix bug with scattering aliens due to calling firstAlive function
enable aliens to collide with each other
aliens will only move to the left
prevent last column from squishing when they enter the world
each alien moves in a random up down motion
refactor variable name for players bullet
refactored fireGunCounter to firePlayerGunCounter
refactored shootTheGun to shootThePlayerGun
refactored fireGunRate to gameUI.firePlayerGunRate
change bullet velocity for players gun
Merge pull request #33 from znagler/game_ceiling

Game ceiling