qtgui: removed all traces of highResTimeFunctions.h
qtgui: removed most of the functions in highResTimeFunctions.h
qtgui: partially switch to gruel high res timer
qtgui: replace timespec with typedef so its easier to replace
gr-qtgui: adding copyright dates to qtgui files.
gr-qtgui: removed OpenGL calls; we still link against the QTOPENGL_LIBS because of some dependencies in Qwt.
gr-qtgui: don't delete the SpectrumDisplayWindow; as a QWidget, it takes care of itself when the parent is deleted.
gr-qtgui: wip trying to figure out segfaults.
gr-qtgui: restructuring qtgui directory to new layout.