Consider showing the test difficulty on the Test Generator

[toebes]

Provide an indication of how hard/soft a test might be. Value should be stored with the test and recalculated whenever something on the test changes.

Things to take into consideration:

1. Not specifying where a fractionated morse crib is
2. Not specifying where a Baconian Words Crib is
3. Patristocrats without a crib
4. Questions which are all too hard (high score values based on suggested scores)
5. Too few of variety of ciphers
6. Lack of "gimme" ciphers to ensure nobody scores a 0
7. Tests leaving all offsets at the default
8. Missing keywords on keyword ciphers (or super short keywords)