Use /usr/bin/env in python shebang

setup.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # Copyright (C) 2011-2014 Sébastien Helleu <flashcode@flashtux.org>

src/qweechat/about.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # about.py - about dialog box

src/qweechat/buffer.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # buffer.py - management of WeeChat buffers/nicklist

src/qweechat/chat.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # chat.py - chat area

src/qweechat/config.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # config.py - configuration for QWeeChat (~/.qweechat/qweechat.conf)

src/qweechat/connection.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # connection.py - connection window

src/qweechat/debug.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # debug.py - debug window

src/qweechat/input.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # input.py - input line for chat and debug window

src/qweechat/network.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # network.py - I/O with WeeChat/relay

src/qweechat/qweechat.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # qweechat.py - WeeChat remote GUI using Qt toolkit

src/qweechat/weechat/color.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # color.py - remove/replace colors in WeeChat strings

src/qweechat/weechat/protocol.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # protocol.py - decode binary messages received from WeeChat/relay

src/qweechat/weechat/testproto.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # testproto.py - command-line program for testing protocol WeeChat/relay