e4a69373d0
Letting xblocks handle scope rather than separating fields into different attrs. Although, split still shunts content fields to a different collection than setting and children fields. The big difference is that content fields will always be a dict and not sometimes just a string and there's no special casing of 'data' attr. The other mind change is no more 'metadata' dict.
Common test infrastructure for LMS + CMS
data/ has some test course data.
Once the course validation is separated from django, we should have scripts here that checks that a course consists only of xml that we understand.