- removed 7 CR characters
 - removed 5 trailing whitespaces
 - replaced 24 tabs with spaces

Added UVs system with and UVs generation test (not very conclusive)

- removed 0 CR characters
 - removed 188 trailing whitespaces
 - replaced 537 tabs with spaces

Useage : "...[.... csg*]" equals "current mesh -CSG- the mesh in the braces".
Keywords :  CsgUnion<csgu>, CsgSubstract<csgs>, CsgAnd<csga>, CsgXor<csgx>
TODO : cleanup useless code.
TODO : Some bugs are still present, some face that disappear should not.
TODO : Correct epsilon useage (see geometry files).
TODO : Coplanar face are not handled -at all-.
TODO : Vertex count goes through the roof in case of a Xor.

Sorry for all the fine projects that use this shader !

work on OpenGL ES contexts.