don't allow CMake to escape UNIX in path for PortAudio
Merge pull request #309 from birarda/master

hopefully fix the broken link to PortAudio on UNIX
conditional repairs for custom modules
Merge pull request #310 from birarda/master

conditional repairs in custom find modules
Merge pull request #304 from ey6es/master

Changed main globals to Application private members; switched from GLUT to Qt for windowing, input, menus.
casing is important for UNIX
Merge pull request #311 from birarda/master

fix casing of PORTAUDIO_ROOT_DIR
Color selection for painting.