Changing schema to store string parent_id and ancestor_ids, instead of object pointer parent and parents
topic data changes schema changes--now, parent_id and ancestor_ids can be serialized and saved.
Merge branch 'store_parent_ids' into dubbed_video_support
Merge pull request #1113 from bcipolli/store_parent_ids

Changing schema to store string parent_id and ancestor_ids, instead off object pointer parent and parents
Force proper spacing on frighteningly strangely styled h2 tag contents.
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into release-0.11

Conflicts:
	kalite/templates/coachreports/base.html
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into better_topic_caching

Conflicts:
	kalite/main/views.py
Mark ancestor and parent properties on tree, in case they're missing.
Fix for #1086: remove duplicate include of jquery-ui.min.js. Elsewhere, removing other extraneous code / linting.
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into better_topic_caching
Merge branch 'better_topic_caching' into dubbed_video_support