GitLab

[FIX #289] raised shader version levels to 130 to fix some issues with more strict glsl compilers due to features we use which where not available in 120.

this is what it does ... in our case using marching cubes

[STYLE #390] adapted all shaders to style

behavior. On this way a couple of other things have been fixed:
* use only 8 textures because the compiler told me
    "undefined variable "gl_MultiTexCoord8""
* simplified highlighting of picked slices as they have the correct size for
 some time now
* removed some commented useless code
* fixed the problem that isosurfaces could show only one texture
* simplified calling of renderSurface function in marching cubes module