2.0.4 changelog

This is a service update that fixes bugs

1. Fixed critical bug that caused immediate crash on iOS3 devices
2. improved UI, adopted new icon set
3. fixed bug where offline roster was not loading on some servers
4. Added XEP-0055: Jabber Search (user directory)
5. Added detailed help pages
6. Added several popovers to ipad UI
7. option to turn off message preview
8. option to hide offline contacts
9. option to turn off logging
10. no longer forces an @ in the username, greater compatibility
11. button to close all active chats at once
12. Added XEP-0078: Legacy Authentication. Works on non SASL servers
13. tested to work with jabberd14 1.6
14. tested to work with Prosody