Update to Assets

Assets update to implement feedback texture.
Creature representation now implements Comparable

Compares based on y position.
Added feedback tiles to BattleScreen

should now show image when mousing over tiles.
Merge branch 'master' of https://github.com/iamhj/HEROES

Conflicts:
	MavenProject/mavenheroes/core/src/main/java/battle/IBattle.java
Merge branch 'master' of https://github.com/iamhj/HEROES

Conflicts:
	MavenProject/mavenheroes/core/src/main/java/battle/IBattle.java