Update/add/improve comments
Update/add/improve comments

Signed-off-by: Ben Alkov <945e3ffa8c419b64848c60660cf17a9e7e2880d1@redhat.com>

fr34k8/atomic-reactor,projectatomic/atomic-reactor,fr34k8/atomic-reactor,DBuildService/atomic-reactor,projectatomic/atomic-reactor,DBuildService/atomic-reactor