Encode list search queries with UTF-8

Should fix exception when searching for non-ascii characters
Make filters in admin be sticky, according to:
http://code.djangoproject.com/ticket/3777
Allow batch approval of doc comments
Allow doc comment filtering by approval status
Add ability to toggle fields in forms

This uses jQuery to make it possible to enable and disable fields in the
default forms, by specifying an attribute on the form class. The form
class still has to implement proper validators, so it does not rely on
client side validations.
Add checkbox for "is online" on events

This gets rid of the annoying requirement to specify things like
"online, United States" for events that are online.

This requires some SQL to run on existing installations:
ALTER TABLE events_event ADD COLUMN isonline boolean NOT NULL DEFAULT 'f';
ALTER TABLE events_event ALTER COLUMN isonline DROP DEFAULT;
ALTER TABLE events_event ALTER COLUMN country_id DROP NOT NULL;

Fixes #166
Actually implement a way to look at older events (events archive)

This also changes the main URL to look at events to be /about/events/
instead of /about/eventsarchive/, and reuses /about/eventsarchive/ to
be the actual achive. Also separates out the training archive to it's
own page at /about/eventsarchive/training/, for easier browsing.
Add a Language model to core

This lists all ISO-639-2 languages, and can be used in foreign keys
from other models.
Add language property to events

Enter the primary language for any event. In the future we will likely want
to filter events bsaed on this, but for now we just show it in the listing
and on the details page.

Requires SQL (after syncdb has run):
ALTER TABLE events_event ADD COLUMN language_id varchar(7) REFERENCES core_language(alpha3) DEFERRABLE INITIALLY DEFERRED;

Also requires loading of fixture:
./manage.py loaddata core/fixtures/language.yaml

Fixes #125
Events are upcoming, not current
Remove extra comma on frontpage.

Strange that nobody noticed this before...
Replace references to old archives URLs with new counterparts
New minor releases
Update size of PDF files
8.3 is no longer supported, so move the documentation links to the archive

We keep them around like all other old documentation versions of course, but we
move them away from the main page.
Drop windows CHM file for documentation

These files haven't been updated for years (8.3.0 and 8.4.0 respectively),
and are hard/impossible to automate the build of. And clearly not many people
are actually using them, since we've had no complaints about the versions
that are there being old.
Override some CSS classes from django-admin in the markdown previews

We don't want to use django style headlines and margins in the preview,
we want something that looks a bit more like the main site. It's not
going to be exact (e.g. the colors will still be wrong), but it will
be a lot closer than without this.
Fix incorrect CVE number in title (link was correct)

Reported by Thomas Hart
Adjust CSS on nav menu for large text layout so that wrapping doesn't result in invisible menu items.
Simplify debian/ubuntu download instructions

Mainly by Christoph Berg, with some cleanups from me.