Moved freetype dependency to optional font module
Fix ordering of include directory setting.
Made APR, Assimp, Freeimage, libsndfile and portaudio optional dependencies
Reorganization and cleanup of allocore build system
More small improvements and cleanup of build system
Better doxyfile. Include paths now include right prefixes.
Removed homebrew formula. The formula now lives in the homebrew-AlloSystem repo
Merge branch 'devel' of github.com:AlloSphere-Research-Group/AlloSystem into horizontal

Conflicts:
	CMakeLists.txt
	allocore/CMakeLists.txt
More simplification and reorganization of build system
Fixed MsgQueue memory deallocation.
Moved OpenGl and GLUT to separate optional modules.
Made OSC an optional module
Made zeroconf a module.
Fixed run.sh script
Merge branch 'devel' of github.com:AlloSphere-Research-Group/AlloSystem into horizontal

Conflicts:
	allocore/src/types/al_MsgQueue.cpp
Fixed not building alloGLV if GLV not available.
Small reorganization
Added flag to avoid GLUT compiler deprecation warnings on OS X
Minor adjustment to make sure linker flags required with lua on OS X are picked up
Fixed building examples when some of the libraries are not available.