Merge branch 'jk/fields' into 'devel'

mo/util.py

mo/web/fields.py

mo/web/org_contest.py

mo/web/org_place.py

mo/web/org_round.py

mo/web/org_users.py

mo/web/templates/org_contest_list.html

mo/web/templates/org_org.html

mo/web/templates/org_orgs.html

mo/web/templates/org_round.html

mo/web/templates/org_round_list.html

mo/web/templates/org_users.html

mo/web/util.py