changed: CPlanarReflectionTest

Loads a generic shader instead of a .fx shader in order to render the scene.
deleted/commented out: the unused code
cleaned up: the source code
updated: physics demo classes
changed: PrimitiveShapeRenderer

Stopped the use of FixedFunctionPipelineManager because it is no longer valid in the OpenGL mode.
changed: PrimitiveShapeRenderer::RenderAxisAlignedPlane()

Commented out the code to set the texture to the second stage so that the lighting works in the OpenGL mode.
changed: PrimitiveShapeRenderer::RenderPlane()

Manually updates the AABB of the rectangle mesh.
normalized: the EoL characters to LFs.