New Geometry Shader Example

[rombust]

Introducing a new Geometry Shader example to the ClanLib V2.2 SVN (Examples/GeometryShader)

This example duplicates the teapot geometry, moving it up and is only shown when all verticies x-position is greater than zero.

http://esoteric.clanlib.org/~rombust/ReleaseImages/geometry.png

* Note, all these 3D examples may be moved in the future to a different directory or merged into a single example *