build: add cmake as buildreq
copr: use usage & summary class attributes, to work with dnf 0.5.0
use shared lib dnfpluginscore for translation wrappers
build: gettext is also needed as a buildreq
build: 0.0.7-1
kickstart: do not include kickstart errors into own messages.

Fixes encoding errors raised on non-EN systems when a file cannot be parsed.