Update version.json
Merge pull request #30 from Dhilan007/v3

Add resource for test case of audio engine.
remove win32 specify library
Merge pull request #31 from andyque/addChipmunk

remove win32 specify library
fix include path
Merge pull request #32 from minggo/v3

fix include path
The Lua Class is not a meta table now. It is a normal table, has a key named ".isclass", and a meta table has been set to it.
To judge a Lua Class's type, must use it's meta table.
All the origin keys (in c/c++) were stored in Lua Class's meta table (and it's "parents's" meta table) .
If a origin key was overrided in Lua, it was backup in a table named ".backup". This backup table is a key of the meta table.
ONLY a origin key was overrided, you can use "tolua. getcfunction(class or object, key_name)" to return it, otherwise, the function return nil.
add Box2D ConvertUTF xxtea
Merge pull request #34 from minggo/add-libs-into-submodule

add Box2D ConvertUTF xxtea
Merge pull request #33 from SunLightJuly/fix_tolua_bug

fixed bug of tolua
remove audio resource
Merge pull request #36 from minggo/remove-audio

remove audio resource
Add dependent library for new audio engine on Win32.