Teerank 4.0

No functionla changes expected.  Under the hood Teerank now use Use
SQlite to store its data.

The only changes worth mentioning is that the ranking system now try to
detect when a match restarted.  This is done to prevent elo points loss
because scores delta would appears negative.

This release took quite some time because I hit some limitation of
SQlite regarding perfomances.  For instance, I had trouble to find a
query to calculate ranks of many players.  I ended up pre-computing them
every 5 minutes.

This release will be a strong base for incoming improvment.  The old
database just caused too much issues.  I've said that I will do a
database reset no teerank.com but I prefer to wait teerank 5.0.  Because
there will be DM and TDM ranking, and probably 1v1 ranking as well.

Teerank 3.1

Teerank 3.0

- JSON API (and its documentation)
- Clans list and servers list with a dedicated page for each server
- Players can be sorted by their "last seen" date
- Modern URL scheme (old URLs still supported)
- Warning when teerank is not updating anymore
- Status page

Teeranks internals have been greatly revisited, resulting in more
stability, reliability and - hopefully - simplicity as well.  In fact,
most of the changes are not really visible to the end user.

Teerank 2.2

Code cleanup and merge "Sonix-" page footer improvement.

Teerank 2.1

Teerank 2.0

First working tree with just a listing of ranked players