added package logging.
added sample input file.
added test case for kerfi.cleanup_property().
fixed docstring.
added test for kerfi.load_raw().
added logging, cleanup_property and load_raw.
improved the kerfi.cleanup_property() function.
renamed property to prop.
changed readline() for readlines().
fixed parsing of raw content.
added kerfi.logging tests.
primogen customization.
fixed package reference.
fixed package reference.
renamed test case class name.
fixed package reference.
fixed docstring.