Don't kill+restart aircrack after 30s, wait 60s for target,

Also detect enabled/disabled interfaces when putting in/out of monitor mode.

wifite/model/attack.py

@@ -6,7 +6,7 @@ import time
 class Attack(object):
     '''Contains functionality common to all attacks.'''
 
-    target_wait = 20
+    target_wait = 60
 
     def __init__(self, target):
         self.target = target