we finally can have most of what we want (wrt. Seahorse / Nautilus /
shared-mime-info) in wheezy-backports, thanks to u's work!
Test results on the ticket. Looks good to me.
After merging the branch into testing:
* remove our custom shared-mime-info package from the testing, devel
and experimental APT suites
* revert commit 63653ec in testing
* merge testing Git into devel and experimental
* push the 3 branches to the main remote + lizard
