- move input and output data in VertexShader struct

- move input and output data in VertexShader struct
- better traces
- specific input data filling function for vertex shaders using vertex
  shader declaration (and not FVF ... maybe FVF will return for fast
  path with simples vertex shader declarations)
- huge vertex shader fixes:
  - add and fix many vs (1.0->2.0) used opcodes in complex shaders
  - improvements to programs parser: parse comments, version, ..
  - add a vertex shader input filler function (parsing vertex shader
    declaration): almost complete
- comments most of the traces (else flood ...)
- add more urls in comments
- indent, cleanups