* Osx: fix qt plugin installation
* Add make install step to travis debug build
* only install under osx
* Add "styles" plugins (for native look'n'feel)
* Osx: upgrade qt from 5.5 to current (5.10.1)
* Fix osx on travis
The qt homebrew formula now installs three qt* symlinks (qt, qt5, qt5@5.x) so we can't use/don't need bash globbing anymore