added MenuItemTower and changed something in GameScene to support this
added MenuItemTower
Merge branch 'hozshan'

Conflicts:
	Classes/GameScene.cpp
	Classes/GameScene.h
	proj.win32/Debug.win32/MyGame.log
	proj.win32/MyGame.v11.suo
	proj.win32/MyGame.vcxproj.filters
reconstructed the project
modified .gitignore
added resources
Build towers
shoot bullets
damage enable, physics body rotation disable
reconstructed Enemy
added Baby
now you can tease the baby
baby can be happy or laugh now
now the towers can rotate
something
remove static strings
reconstructed resources paths
UI enable
added modal layer
money enabled