closed #5537: add setAutoStep, isAutoStep and step method for PhysicsWorld.
closed #5537: add test case
init version of VertexIndexBuffer
change xcode project file
compiles OK: raw version of vertex Index buffer, half version of vertex data
add indexData
Merge branch 'v3' into v3_renderPrimitive

Conflicts:
	build/cocos2d_libs.xcodeproj/project.pbxproj
finish index data
Merge branch 'v3' into v3_renderPrimitive
original version of Primitive
Merge branch 'v3' into v3_renderPrimitive
Optimize the implementation of hen-prebuilt tools.
original version of PrimitiveCommand
Consider the lua-bindings when generating prebuilt engine.
using VertexBuffer instead of raw buffer
using indexBuffer instead of raw VBO
Store the version of engine into the prebuilt engine.
refactor vertex data
using vertex data in fast_tmx
add _vertexBuffer back in Fast_tmx
remove IndexData class