Refactor LogMessageBuilder, move operators for glow objects and glm types to external headers (refs #213)
Merge branch 'master' into glowbase

Conflicts:
	source/examples/commandlineoutput/main.cpp
	source/glow/CMakeLists.txt
	source/glow/include/glow/LogMessageBuilder.h
	source/glow/include/glow/LogMessageBuilder.hpp