better display of groups for instructor


Former-commit-id: 761d1f38b0023b4efb803062c515493e0ab746b3
UI to set min/max group sizes (not yet honoured anywhere)


Former-commit-id: e196976b08837811f44302e8baa4ceaa079442f8
check group limits in student UI


Former-commit-id: 52069f07c9c173f2f22eb1f12449388a92d7869f
Merge branch 'master' into groups-update


Former-commit-id: d06d2fb7982de5db9d86101a302bc9cb0bce3116
start of a group-info page


Former-commit-id: 4375bc6a32d5ecd69525bca45b7bfdce4ef42a48
Merge branch 'master' into groups-update


Former-commit-id: 676a69bf4be5c900db2ce2a9355091ac49436d2e
more on a group view


Former-commit-id: c673a57ae1460cc903037c325b0a1fdc104f34fc
Merge branch 'master' into groups-update
Merge branch 'master' into groups-update
usable group info view
split machine-readable group info out into a separate view