Update the GLSL highlighting file.
Review Request #124301 - Created July 8, 2015 and submitted
Include more qualifiers, keywords and functions. Also highlight tesselation evaluation/control shaders (*.tes, *.tcs). REVIEW: 124301
manual testing on our training material shaders, seems to work fine and looks much better than before
looks good, but for kf5 you may want to use the added default styles. this will allow you to get rid of the item ddatas bold flag, since the predefined default styles should be good enough.
...but you can do this in a separate commit. then this version is also usable with kde4.