make use of custom logger anytime in rpmkit.identrpm
fix a couple of PEP8 errors in rpmkit.swapi
simplify rpmkit.swapi.set_option to allow omitting  to use default, raw_input
changed the comment style in rpmkit.swapi
fix one more PEP8 errors in rpmkit.swapi
add doctext into some functions in rpmkit.swapi