--crack option provides commands to crack a handshake

Requested in #15

Wifite.py

@@ -9,6 +9,7 @@ from py.AttackWPA import AttackWPA
 from py.AttackWPS import AttackWPS
 from py.CrackResult import CrackResult
 from py.Handshake import Handshake
+from py.CrackHandshake import CrackHandshake
 
 from json import loads
 import os
@@ -30,6 +31,8 @@ class Wifite(object):
 
         elif Configuration.check_handshake:
             self.check_handshake(Configuration.check_handshake)
+        elif Configuration.crack_handshake:
+            CrackHandshake()
         else:
             Configuration.get_interface()
             self.run()
@@ -70,7 +73,6 @@ class Wifite(object):
             hs.analyze()
             Color.pl('')
 
-
     def run(self):
         '''
             Main program.