IPayment=>Artifact; AppDb with SqlLite
Incorrect cast from Artifact.Message to byte[]
card reader worker-loop ends prematurely; wakeful service w/o AppDb crash
minitek: dont silently go on when we cannot access usb device
groundwork towards device manager as a service and period device scanning
coallece USB events
fix busy-loop in minireader when device is unplugged and we delay closing the handle
remove periodic log output while waiting for magtek reader
clean up logcat