Made a PointlLightShadowRenderer and a PointLightShadowFilter.
- This will need a lot of refactoring as a lot of code is duplicated with the PSSMShadowRenderer
- Also i plan to change the Shadow map rendering to a cubemap instead of 6 separate textures.
Added a cornell box model and a test case
git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9942 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
