Adding sql for registration_views, entity class `RegistrationViewEntity` and service class `RegistrationViewService`
Adding functional tests for `RegistrationViewResourceFunctionalTest`s
First round of PR fixes
Adding functional tests for createRegistrationView and getRegistrationViews.
 - Fixing a bug uncovered by one of them, too :)
Adding validation to block ids in created or updated registration views
 - did some refactoring of service names we've talked about in other contexts
Merge pull request #117 from CruGlobal/feat/registration-views

Feat/registration views