New version: 0.4.9
build: 0.4.9-1
doc: api: Plugin.name.
Add pkg_spec attribute to MarkingError.
Log packages causing history undo failures.
rename: cli.command.Command.doCommand() -> run()

shorter, sweeter, less verbose, less explicit, breaks fewer conventions.
drpm: add config options + docs, load updateinfo.xml
get_package_target(): don't use yum compatibility attribute
drpm: download delta packages if possible
get_package_target(): support the "donecb" callback
drpm: spawn delta rebuild jobs, report failures
drpm: fall back to rpm download on drpm errors
Hide the progress bar on failfast abort