updated comments
#306: Increase release tag for mass builds
#306: added comments
Merge pull request #307 from abf/rosa-build:306-increase-release-tag-for-mass-rebuilds
 #306: Increase release tag for mass rebuilds
#306: added specs, updated regexp
Merge pull request #308 from abf/rosa-build:306-increase-release-tag
 #306: Increase release tag for mass rebuilds
#309: added extra_params into BuildList
#309: pass extra_params into workers
#309: updated BuildList API
#309: fixed spaces in params
Merge pull request #310 from abf/rosa-build:309-allow-to-specify-options-for-rpmbuild
 #309: Allow to specify options for rpmbuild