First pass at publish framework for ostree repos
Update for PR comments
Merge pull request #6 from pulp/barnabycourt-publish

First pass at publish framework for ostree repos
Merge branch 'master' into jortel-sync

Conflicts:
	common/pulp_ostree/common/constants.py
	plugins/pulp_ostree/plugins/distributors/web.py
consistent naming of constants; read importer config file.
purge unwanted tests.