add action
Merge branch 'master' of https://github.com/cocoscodeide/EarthWarrior3DLua
add LoadingScene
modify LoadingScene
Merge branch 'master' of https://github.com/cocoscodeide/EarthWarrior3DLua

Conflicts:
	src/MainMenuScene.lua
Merge pull request #7 from chuanweizhang2013/master

add loading layer