Timer module. WPA Handshake attack is prettier.

1. Timer module for timing things. Should've done this a while ago.
2. WPA handshake attack outputs # of clients, lists all clients, has countdown
3. WPA Handshake Attack deauths all clients at the same time.
4. Fixed bug where WPA handshake attack never timed out. Fixes #23
5. WPA Cracking via aircrack-ng shows percentage & ETA.
6. Mild refactoring / cleanup of AttackWPA module.

py/Aircrack.py

@@ -8,7 +8,7 @@ import os
 
 class Aircrack(object):
     def __init__(self, ivs_file=None):
-        
+
         self.cracked_file = Configuration.temp() + 'wepkey.txt'
 
         # Delete previous cracked files