translations update 2013-05-23

- integrates current translations from Transifex
Clean up mining CReserveKey to prevent crash at shutdown

Fixes issue#2687
Merge pull request #2688 from gavinandresen/issue2687

Clean up mining CReserveKey to prevent crash at shutdown
All-resolution pixmap, to make win32 builds determisitic again
Fix crash-at-shutdown if exiting before initializing wallet
Merge pull request #2683 from Diapolo/translations

translations update 2013-05-23
Bump build number to 0.8.2.2 for v0.8.2rc3