swapi: fix legacy except block style 'except <exc_class>, <var>' lines to the one in py3k
make JSON output of swapi valid
swapi: make JSON output of swapi valid
swapi: add a doctest case to check the case empty data was passed in results_to_json_str()
fix conflicts
swapi: update the output of session examples
update the rpm changelog
swapi: call results_to_json_str even if there is no result data
swapi: make not output results if something goes wrong w/ arguments and opitons
add note about coverage
fix some pylint errors: no-member, etc.
restrict coverage targets to rpmkit[.*[.*]] only
changed options for coverage
make rpmkit.extras.listerrata_for_releases.main() printed help also if invalie args or args missing
disabled exclude option by default and specified explicitly for all module tests
fixes bugs in doctest cases of rpmkit.extras.listerrata_for_releases