Partial port to qt5, still having some issues.
Fixing glwidget display.
Fixing full screen from F2.
Fixing status bar initial height.
Bumping version and making adjustments for os x bundle.
Bumping version to clearify this is newer.

Although not incompatible nor with much different features the major
version was bumped to indicate it is newer than the v1.5 tag, and also a
richer versioning scheme (semver).
Merge branch 'master' of github.com:roboime/grSim