Change shebang from /usr/bin/python to /usr/bin/env python

Resolves #99

wifite/model/attack.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2.7
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 import time

wifite/model/client.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2.7
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 class Client(object):

wifite/model/handshake.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2.7
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 from ..util.process import Process

wifite/model/result.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2.7
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 from ..util.color import Color

wifite/model/target.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2.7
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 from ..util.color import Color

wifite/model/wep_result.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2.7
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 from ..util.color import Color

wifite/model/wpa_result.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2.7
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 from ..util.color import Color

wifite/model/wps_result.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2.7
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 from ..util.color import Color