light engine feature support.

[sonygod]

https://github.com/PDeveloper/hxDynaLight

may be combine this lib into flame as light engine plugin 。。
current flambe have no light support..

[aduros]

This is really specialized, and can be easily put into a third party library by someone else (at least when #73 is done to allow polygon rendering).

[sonygod]

http://bit.ly/ZSgkjL
take a look this example ,it's look well 2d shadow