GLMixer Code

Edited wiki page RelatedSoftwares through web user interface.

Minor change

Fixes Crashes and some minor design changes

Improvement of GLSL fragment shader performance : minimize the amount of
'if' statements:
- Moved the selection of convoluation kernel to the C++ code of
ViewRenderWidget, using a uniform variable to set the kernel (instead of
a sequence of ifs in the shader).
- Computation of HSL <-> RGB conversions without any if (using mix and
step functions instead)

I have now merged my changes with Bruno's revision 624 from the trunk

Committing before integrating Bruno's last changes from the main branch

Added support for replaying on recorded path - just basics (No support for Key Points yet!)

Minor change

Compilation fix (use QString::null instead of NULL).

DEALLOCATION FIXED?