Expand operations menu to include brute force, mask, and rule-based attacks

[MrCrLr]

This could be accomplished by each operation generating a new wordlist based on user's inputted criteria and then running a scan for matches against the generated list. One problem may be the list generated could become too long. Therefore Cracker Barrel would need to provide some info before creating the new list. Such as estimating how long the potential list will be and how long it may potentially take to run the scan.

[MrCrLr]

Implemented a mask-based attack that's generated batches on the fly in RAM for speed. It does not currently save the generated lists. Might consider an option for that later.

[MrCrLr]

Added a functional brute force attack generator.