osgPPU v0.4 tagged

Hi folks,

i've just tagged v0.4 of osgPPU (post processing NodeKit? for OpenSceneGraph). The new version does support:

- full support for osg 2.8
- New Modules:
-- UnitInOutModule? processing units can now be loaded from .so/.dll modules
-- UnitCamera? - bring additional cameras into the osgppu pipeline (usefull for multiple cameras being processed by osgPPU)
-- UnitCameraAttachmentBypass? - put any camera attachment into the pipeline (depth buffer, color buffer, stencil, ...)
- deprecated class "Shader" removed (use ShaderAttribute? instead)
- small build fixes (changed Cmake files)
- examples do build now with osgppu_ prefix
- support for .so version build extensions (i.e. libosgPPU.so.0.4.0)
- new examples:
-- ssao - simple screen space ambient occlusion
-- glow - simple example shows how to use osgPPU to let certain objects glow)
-- cuda - shows how to compile and use CUDA kernels together in ppu pipeline
-- CUDA support - bring cuda kernels into osgPPU pipeline, by loading CUDA-kernel through UnitInOutModule? unit (CUDA kernels has to be compiled externally into an .so/.dll file)
- full support of "NodeKit?" definition

Take a look, if you are interested.

Website is: http://projects.tevs.eu/osgppu/