Add uhash.dat as test data
Add HashImporter
Add testHashImporter.cpp
Verify signature of uhash.dat
Check read length before memcmp()
Use {} for constructor
Define FIELD_SIZE for uhash userphrase
Update debug message
Skip chewing_lifttime
Avoid magic number
Merge branch 'feature/uhash'

* feature/uhash:
  Avoid magic number
  Skip chewing_lifttime
  Update debug message
  Define FIELD_SIZE for uhash userphrase
  Use {} for constructor
  Check read length before memcmp()
  Verify signature of uhash.dat
  Add testHashImporter.cpp
  Add HashImporter
  Add uhash.dat as test data