Install/compilation guide

[kilir]

Hi Ralf,
I'm not sure if anybody is actualyl lookign at those pages, but http://mtex-toolbox.github.io/files/doc/compilation.html and http://mtex-toolbox.github.io/files/doc/installation.html are not too much up to date.
I could try and start toupdate it as best as I know. Do you wnt to keep the supported version matrix this way or drop the old stuff?
Cheers,
Rüdiger