Track and display statistics

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Number of times trained, progression stats, etc. There are a lot of interesting things that could be tracked and showed to the user in graph format to help them visualize their progress and encourage them.

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Some concrete examples from Bob K4RLC:

1. Percent correct;
2. Latency – time it takes to press Show button (possible indication of character recognition and processing speed);
3. Average number of repeats before hitting the Show button;
4. Percent correct for longest length