add pyfaf.utils containing decorators, parse, proc

Signed-off-by: Richard Marko <rmarko@redhat.com>
use absolute imports in init

Signed-off-by: Richard Marko <rmarko@redhat.com>
pyfaf.format -> pyfaf.utils.format

Signed-off-by: Richard Marko <rmarko@redhat.com>
pep8 cleanup

Signed-off-by: Richard Marko <rmarko@redhat.com>