Fix problem with group summary stats not displaying.
Integrated bootstrap on control panel. Halfway styled.
Halfway through styling facility_management.html
Coach js now works, have framework for rest of refactor
finish markup for facility_management page
Move student groups works & pagination styled.
Fixed additional summary stats bug with ungrouped students
Add minor styling to device management page
Prevent "pid ref'ed before assignment" error in cherrypy.
Control panel tests pass.
Convert student view to bootstrap & fix duplication bug.
Merge pull request #2131 from dylanjbarth/control_panel_ux

Control panel & fix for summary stats not showing
target the a node when we get the facility delete link rather than the
current node, which is just a simple span
add mixins from nalanda-rct2
add browser test for deleting a facility
add dummy device to greatly speed up tests!
Add 20 minute (but configurable) default timeout to user sessions.
Add option to disable session timeout by setting = 0.
add tests for group deletion
Fixes listing of other groups on individual group page on control panel.