Changed travisCI testing to use debug build. Also enabled -gui compiling to catch asserts even if no testing is performed
Changed travisCI testing to use debug build. Also enabled -gui compiling to catch asserts even if no testing is performed

MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3