Add support for python 2.x

Author: danboid

README.md

@@ -36,7 +36,7 @@ After installing shufti, and only once (before your first use) you need to right
 It is also possible to run shufti from the command line. This is the only way to use it under macOS currently. You'd run:
 
 ```
- $ python3 shufti.py /full/path/to/image/file
+ $ python shufti.py /full/path/to/image/file
 ```
 
 or if you're running shufti from the Windows command prompt using the .exe, something like:

shufti.py

@@ -1,8 +1,8 @@
-#!/usr/bin/python3
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 '''
-shufti 2.1git - The persistent image viewer
+shufti 2.1 - The persistent image viewer
 
 By Dan MacDonald, 2017.
 
@@ -73,7 +73,7 @@ class AboutShufti(QLabel):
 
     def __init__(self):
 
-        QLabel.__init__(self,"shufti 2.1git\n\nBy Dan MacDonald, 2017\n\nIf you find shufti useful, please make a donation via PayPal\n\n[email protected]\n\nThanks!")
+        QLabel.__init__(self,"shufti 2.1\n\nBy Dan MacDonald, 2017\n\nIf you find shufti useful, please make a donation via PayPal\n\n[email protected]\n\nThanks!")
         self.setAlignment(QtCore.Qt.AlignCenter)
 
     def initUI(self):               
@@ -90,11 +90,11 @@ def center(self):
 class Shufti(ShuftiWindow):
 
     def __init__(self):
-        super().__init__()
+        super(Shufti,self).__init__()
         try:
             self.key = sys.argv[1]
         except IndexError:
-            print('\nshufti 2.1git\n\nTo use shufti from the terminal, you must specify the full path to an image as a parameter.\n')
+            print('\nshufti 2.1\n\nTo use shufti from the terminal, you must specify the full path to an image as a parameter.\n')
             sys.exit(1)
         self.dbSanitise()
         self.formats = ('.png', '.jpg', '.jpeg', '.gif', '.bmp', '.pbm', '.pgm', '.ppm',