Merge pull request #25 from huangshiwu/ludum-dare

add mainscene
Merge pull request #26 from huangshiwu/ludum-dare

scene arrangement and improve
Remove unused files.
Merge pull request #27 from natural-law/ludum-dare

Remove unused files.
Registe key event on Mac & Windows.
Merge pull request #28 from natural-law/ludum-dare

Register key event on Mac & Windows.
add hide mapLayer process