removed user model and added it to buweb content models. moved profile publisher specific methods to app/extensions/
added pundit role methods
added roles, and buweb content models urn namespace settings
Merge branch 'master' into remove_user_model
updated buweb-content-models gem to 0.11.0
Merge pull request #23 from biola/remove_user_model

removed user model and added it to buweb content models.