[Shotwell] Two issues while trying to import from f-spot

[Lucas Beeler]

> "L 2467 2011-08-31 13:29:24 [WRN] No namespace information for
> XMP-Präfix `lr' available"

This error is actually an unrelated and spurious artifact of the exiv2
library that Shotwell uses to read metadata from files, unfortunately
(see this ticket here: http://redmine.yorba.org/issues/3950). It would
be great if it were related, 'cause that would give us more insight
into the problem.

Cheers,
Lucas