[trunk] D-Bus (and libnm-glib) API changes

[Dan Williams <dcbw redhat com>]

A few more changes.

In the D-Bus API, the 802-11-wireless setting item 'seen-bssids' has
been changed to type ARRAY/STRING rather than ARRAY/ARRAY(6)/BYTE (see
NetworkManagerConfigurationSpecification on live.gnome.org).

libnm-glib's nm_access_point_get_hw_address() function now returns
'const char *' rather than 'char *'.  The returned value should not be
freed.

A GNOME-applet-specific change is that UINT64 values (like the
connection timestamp) are now stored in GConf as strings, not doubles.
if you have been running trunk of the applet from the past few days you
may need to clear out any 'timestamp' keys on the 'connection' setting
of the saved connections in GConf.

Dan