fixed and extended UserLog functionality; added support for multiple activity types and logging teacher total login time and # coach reports.
get students to view student_view report on login, track student view usage.
renaming misnamed 'total_logins' to 'count'
Merge branch 'rename_total_logins' into track_teachers

Conflicts:
	kalite/control_panel/views.py
add support for viewing ungrouped students as a group in facility_usage report
make teacher data available via CSV
implement multiple users; pre-create them in the view.
setting pct videos by querystring arg
make the number of users configurable as well, defaulting to old value (1)
implementing logouts
fixing js bug
Gracefully pass over video downloads that errored out with 404's.
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into track_teachers

Conflicts:
	kalite/control_panel/views.py
	kalite/utils/internet/decorators.py
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into track_teachers
Display message on update page when video wasn't found and was skipped.
Reinstated immediate video download status check, but with 1 sec delay.
Actually add the 1 sec delay to the video status download check.
Bump the build number.
reducing # of threads in debug mode--could have been a cause for recent memory problems.  Can be adjusted in local_settings if desired.
Auto-clear old message before displaying one with the same id.