Buffer objects examples.

• AnimatedShape Animated shape example
• SoBufferedShape Huge shapes example
• GPUGeometry GPU geometry computation example
• PrimitiveRestart Primitive restart feature of SoBufferedShape example
• SimpleVertexAttribFeedback Simple SoVertexAttribFeedback feature example
• InterleavedVertexAttribFeedback Simple SoVertexAttribFeedback feature example in interleaved mode
• VertexAttribFeedback SoVertexAttribFeedback base version of the GPU geometry example
• SoVertexShaderParameter Buffer object support in SoVertexShaderParameter
• BufferedShapePicking Picking with SoBufferedShape