Disable stereo mode for Faulty Qt versions
Starting with Qt version 5.7.0 the stereo mode is broken, which causes OpenFlipper to crash on startup using qt version 5.7.0 on linux systems.(see #68 (closed) ) This branch checks the qt version at runtime during command line parsing. If qt version 5.7.2 or grater is used a warning is output to command line since these qt versions have not been tested yet, but should not have the fault. for qt versions starting with 5.7.0 to and excluding 5.7.2 the stereo mode is disabled and a warning to inform the user about the fault in the used qt version is displayed.
fixes #68 (closed)