cherry-picking: starting implementation of VBO support

Conflicts:
	src/host-ios/Classes/MoaiAppDelegate.mm
	src/moai-sim/MOAIVectorDrawing.cpp
	src/moai-sim/MOAIVertexBuffer.cpp
	src/moai-sim/MOAIVertexBuffer.h
	src/zl-gfx/zl_gfx_opengl.cpp
	xcode/ios/MoaiSample.xcodeproj/project.pbxproj
	xcode/libmoai/libmoai.xcodeproj/project.pbxproj
cherry-picking: first working proof of concept for VBO implementation

Conflicts:
	src/moai-sim/MOAIVectorDrawing.cpp
	src/moai-sim/MOAIVectorDrawing.h
	src/moai-sim/MOAIVertexFormat.h
had to manually include alot of changes to get vertexbuffer running again - but no run marker as of yet
cube sample not working with VBO either
Merge branch 'vbo'
use sdl host again, added build scripts for android/ios libs