GLSL Routines for Blender BGL wrapper

This patch adds the bare minimum necessary functions needed to use GLSL with bgl. There are other flags that could make into it, but I'm yet to list them all.

Please note that glSheaderSource was implemented manually to account for the need of char ** in the original code (which our macros couldn't handle).

I followed what PyGL does, instead of a function with 4 arguments, the wrapper takes only 2, so the user can create only one at a time, what I find reasonable.


Images:
[1] - http://www.dalaifelinto.com/ftp/bgl_glsl/glsl_3dview.jpg
[2] - http://www.dalaifelinto.com/ftp/bgl_glsl/glsl_3dview2.jpg
[3] - http://www.dalaifelinto.com/ftp/bgl_glsl/glsl_3dview3.jpg

Test python script:
[4] - http://www.dalaifelinto.com/ftp/bgl_glsl/bgl_glsl.zip

- commited with changeson rev. 46444

[dfelinto, 2012-04-26 14:32:12]

I talked with Mitchell and realized that there will always be something else we
want in bgl.

I think it's time to seriously consider including pygl with blender. Thus I
decided to hold on committing this patch.

[dfelinto, 2012-05-09 13:53:50]

commited with changes on rev. 46444
full log here:
http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=...