devilry_subjectadmin...app.js: Support routeTo querystring.

Makes it possible for us to create named RedirectViews for linking
into subjectadmin.
devilry_subjectadmin: Built JS with support for routeTo in querystring.
devilry_subjectadmin: Redirect views for subject, period, assignment and group.

Needed for search.
devilry_nodeadmin: Added redirect view for linking to nodes in the ExtJS app.

We have not updated the app to handle routeTo in querystring yet, so
this is not complete.
devilry_nodeadmin...app.js: Support routeTo in querystring just like subjectadmin.
devilry_nodeadmin: Built JS with routeTo.
Merge branch 'new-examiner' of github.com:devilry/devilry-django into new-examiner