* Modified constructor of configloader to create basic config groups if
  they do not exist yet

* added mapping for some libconfig variables to lib defines
  refactored config defines to use prefix FACEFU_ (eg CONFIG_FILE is now
  called FACEFU_CONFIG_FILE)

	geändert:   inc/configloader.hpp
	geändert:   inc/defines.hpp
	geändert:   src/configloader.cpp