support pack resource binary in 32bit platform
rearrangement the sprite pack struct for 64bit platform
bugfix: correct the size of struct in 32bit platform
fault don't exit when lua throw error
bugfix: sizeof part
use ushort index buffer
sizeof(idxs)
convert polygon to multi quad
clear screen before drawframe is not default behavior, call ejoy2d.clear by yourself
bugfix: timer update
Merge pull request #6 from cloudwu/master

merge the official update