New "--pmkid" option. Improvements to "--crack" feature.

--pmkid option will only attack WPA networks with the new PMKID capture + crack attack

• This option avoids the WPS Pixie-Dust and WPA 4-Way Handshake capture attacks.

Improvements to --crack feature:

• Allows selecting multiple handshakes to crack in bulk.
• Includes captured PMKID "handshakes" (PMKID hash stored in *.16800 files in the hs directory).
• If wordlist (--dict) is not found, prompts user to enter a wordlist file.
• Note: --crack longer prints different ways to crack handshakes (Hashcat/Pyrit/Cowpatty/Aircrack/etc).
  • Wifite will try to crack the handshakes instead.
  • Cracks WPA 4-Way Handshakes using aircrack-ng
  • Cracks PMKID "handshakes" using hashcat.
  • TODO An option to print the commands to crack (as one-liners that can be pasted into terminal)
  • TODOs Options to allow users to specify the cracking methods (hashcat + cuda, pyrit, etc).

Other changes:

• --crack will show cracked results with one target per-line (improves readability).
• Large refactoring of the code base may introduce new bugs.