Draw background image instead of tiles

Work in progress, need to fix some textures/add transparency
Merge branch 'master' of https://github.com/siketh/COP4331_Project

Conflicts:
	TowerDefense/src/com/group23/TowerDefense/Level/Level.java
Display health and gold on top bar
fixed it so that enemys only get removed at end of path
Merge branch 'master' of https://github.com/siketh/COP4331_Project