Slash AFK (/afk)

- Dutch translation typos fixed
- More control over the AutoClear option
- Changed loaded message into a 'notification' thereby not being displayed if you have 'Show notifications' off
- Addons can register for being notified if the player goes AFK or DND
- Remember selected language session-persistantly
- Automatically go AFK by inactivity time
- Small fixes/additions
- Code cleanup
- Temporary spanish translations added with the help of translation-websites

None

Any problems or user requests? let me know.