Note that this has been tested successfully with the OS30 formats, but
has NOT YET BEEN FULLY TESTED with Opensync 0.2x. The only problem that
may be present here is incorrect namespace assignment within the
converter code. Libwbxml parses it out from the strings whereas the
internal implementation looks out for namespace assignments directly to
the nodes in the libxml2 structures.

The implementation of this uncovered a couple of subtle errors in the
general XML handling within sync-engine. These have been fixed, and the
entire pathway will be checked when airsync.py is cleaned up shortly.

Attribute processing is badly broken in the wbxml implementation - this
is not a problem for sync-engine as AirSync does not use attributes in
its XML code. However this should be fixed up (can be as a low priority
job) at some point for completeness and in case Microsoft go and change
things at a later date.