Merge pull request #2 from jlaunonen/querybuilder

Querybuilder / partial but working implementation
python manage.py check basics
labour/querybuilder: add compiled csrf.js
gitignore: add node_modules
labour/querybuilder: add admin menu to query view
README: name change
programme: filter schedule views by event in admin
programme: TimeBlockAdmin
programme: fix TimeBlockAdmin
core: fix frontpage/current events
core: frontpage, current events
README: remove obsolete stuff
programme: implement the Eemeli Aro konopas.org format
Adds links to signups in query.
Adds remove-buttons for filters
Fix random null string.
Remove custom block hiding class

* Use BS provided class instead.
Change ID link to row-link; moved ID to be debug-option.
Adds default visible columns
Adds result column ordering and grouping.