Remove Xcode configuration of users.
Merge pull request #24 from natural-law/master

Remove Xcode configuration of users.
Merge pull request #25 from Ryeeeeee/master

add enemy bullet hurt
added z order to everything, 1 less GL call in sprite3d’s draw
Merge branch 'master' of https://github.com/Wu-Hao/Moon3D
moved cull face to app delegate
init normal to zero before calc normal from mesh
Merge pull request #26 from dabingnn/fix_normal_calc

init normal to zero before calc normal from mesh
completed enemy preload.
merge with master
remove un-needed files
add MainMenuScene
Merge github.com:Wu-Hao/Moon3D
remove un-used files
remove un-used files
Merge pull request #27 from fusijie/master

completed enemy preload.
add MainMenuScene
Merge github.com:Wu-Hao/Moon3D