Identification
Image transfer

Enforce command sequences:
 force VerifyStop after non-retry verify result comes in
 etc

Verify PAM messages fit with GDM/gnome-screensaver

Register fprintd' po file with Transifex, Rosetta or the Translation Project

Support insertion/removal of devices

Fix memory leaks with print data/gallery when using the verify_async and
identify_async

Add some hardware protection by making sure devices aren't opened and
reading for more than a certain amount of time.

Add POS use case

Review error cases, and possible errors