Small cleanup of cmake build for NVIDIA and AMD OpenCL
For AMD Stream SDK use:
INCLUDE_DIRECTORIES( ${AMD_OPENCL_INCLUDES} )
LINK_LIBRARIES( ${CMAKE_ATISTREAMSDK_LIBPATH}/OpenCL.lib )
For NVIDIA CUDA SDK:
INCLUDE_DIRECTORIES( ${NVIDIA_OPENCL_INCLUDES} )
LINK_LIBRARIES( ${NVIDIA_OPENCL_LIBRARIES})
Added Demos/ThreadingDemo showing how to use the cross-platform btThreadSupportInterface under Windows.
Added Demos/ParticlesOpenCL showing how to run the NVidia particle demo under OpenCL implementations by AMD, NVidia and MiniCL (CPU)