PasswordChecker - wrapper around zxcvbn
 Note that the JS is included as a Qt Resource, as it becomes part of the binary and this seems to be the most reliable distribution method
 Added a GUI widget for displaying the results in realtime - only added to GeneratorWidget right now, but easy to add elsewhere
 Note that zxcvbn has serious problems with long passwords - anything over 64 characters results in a noticeable delay with a 3GHz C2D,
by the time the length reaches 256, it takes almost a minute to calculate the effective entropy of ~1500bits.