Styling and wording tweaks on easy admin page.
Merge branch 'master' of github.com:learningequality/ka-lite into release-central
Adding custom validation
Fixes both issues in #880; styling issue due to missing </div> closing tag.
Change wording of subscribe checkbox
checking box by default
Ignore unknown logs.  This is important for when exercises or videos get removed from the topic tree.
Merge branch 'ignore_unknown_ids' of github.com:bcipolli/ka-lite into release-0.11

Conflicts:
	kalite/coachreports/views.py
	kalite/templates/admin_distributed.html
	kalite/templates/registration/registration_form.html