delete the tower package
Merge https://github.com/sylhero/SOEN6441

Conflicts:
	SOEN6441/src/TEST/NewTest.java
	SOEN6441/src/gameState/SelectMapState.java
add Tower
add tower feature and some basic function
edit TowerBase.java, add tower package
add Tower
add tower feature and some basic function
edit TowerBase.java, add tower package