[sync] Major update to SyncML module. Including Outlook support

[Oliver Kuhl]

Hello Karsten,

I didn't have the time to test it right now, but I think your work is
making making many people happy and horde just another step better than
the rest. Outlook synchronisation is what I waited for a long time. So
thank you very much!

If my actual project is finished, I will test everything in detail and
give feedback.

Gruss,
   Ollie.