Update dependency script for fedora.
Use OPENSCAD_LIBRARY include path only if it actually exists.
Detect qmake-qt5 first, use qmake as fallback (needed for fedora).
Suppress find error output.
Add platform abstraction for setenv() which is not supported on MinGW.
Switch to MXE master branch using mingw-w64/static targets.
Install fontconfig configuration folder.
Move additional conf files for fontconfig back to previous location.
Use FcMatchPattern to make alias replacement work.
Remove code to add Windows font folder - handled by fonts.conf.
Merge pull request #929 from openscad/fix-fontconfig

Fix fontconfig logic
constness, codingstyle
Merge pull request #928 from openscad/mingw-master

MXE master / Fix Windows cache folder
Merge branch 'master' of github.com:openscad/openscad
Use strong bindings for the liberation font aliases.