remove infinite loops from management commands. remove cruft from api_views, and tweak video_download to handle the more robust videodownload logic
updating comments, debug-based Exception forcing, to complete.
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into avoid_command_infinite_loops

Conflicts:
	kalite/templates/video_download.html
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into avoid_command_infinite_loops

Conflicts:
	kalite/main/management/commands/subtitledownload.py
	kalite/main/management/commands/videodownload.py
	kalite/templates/video_download.html
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into force_sync
expose a simple endpoint for launching syncmodels, expose a button for launcing that API endpoint
moving button to easy_admin page, fixing debug-only class
slightly better UI with no extra div
mucking around with loadtesting
Add "admin" indicator for user list, so that it is consistent with other sub-pages of easy admin
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into user_list_admin_indicator
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into force_sync
Merge pull request #548 from rtibbles/user_list_admin_indicator

Add caret indicator to admin for user list
Merge branch 'user_list_admin_indicator' of github.com:rtibbles/ka-lite into release-0.10.0
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into load_testing_fix
simplified url logic, added clearfix class from khan-site (thanks @jamalex)
Performance: intercept api/v1 urls in nginx, and return {}
Merge pull request #559 from gimick/nginx_apiv1_speedup

Performance: intercept api/v1 urls in nginx, and return {}
Merge branch 'release-0.10.0' into avoid_command_infinite_loops
renaming misnamed 'total_logins' to 'count'