Kick/ban log and bans in database

[MrBondt]

http://forum.sa-mp.nl/index.php?topic=30167.0

Things to do on relative short term now:

• Update gamemode to save log items to the database, while keeping the old method intact as well.
  
• Update Nuwani to use the database. No way of having a hybrid solution here though, so Nuwani will switch completely from the get-go.