add some missing shbangs

usr/lib/linuxmint/mintMenu/keybinding.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 # -*- coding: utf-8; -*-
 # Copyright (C) 2013  Özcan Esen <ozcanesen@gmail.com>
 # Copyright (C) 2008  Luca Bruno <lethalman88@gmail.com>

usr/lib/linuxmint/mintMenu/plugins/__init__.py

@@ -0,0 +1 @@
+#!/usr/bin/env python

usr/lib/linuxmint/mintMenu/plugins/execute.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 import os
 import subprocess
 

usr/lib/linuxmint/mintMenu/plugins/filemonitor.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 import os
 import os.path
 import threading

usr/lib/linuxmint/mintMenu/plugins/recent.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 import gi
 gi.require_version("Gtk", "2.0")
 

usr/lib/linuxmint/mintMenu/pointerMonitor.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 import gi
 gi.require_version("Gtk", "2.0")