Added a check for Python version.

bazarr.py

@@ -4,10 +4,27 @@ import subprocess as sp
 import time
 import os
 import sys
+import platform
 
-from bazarr import libs
 from bazarr.get_args import args
 
+
+def check_python_version():
+    python_version = platform.python_version_tuple()
+    minimum_python_version_tuple = (2, 7, 13)
+    minimum_python_version = ".".join(str(i) for i in minimum_python_version_tuple)
+
+    if int(python_version[0]) > minimum_python_version_tuple[0]:
+        print "Python 3 isn't supported. Please use Python " + minimum_python_version + " or greater."
+        os._exit(0)
+
+    elif int(python_version[1]) < minimum_python_version_tuple[1] or int(python_version[2]) < minimum_python_version_tuple[2]:
+        print "Python " + minimum_python_version + " or greater required. Current version is " + platform.python_version() + ". Please upgrade Python."
+        os._exit(0)
+
+
+check_python_version()
+
 dir_name = os.path.dirname(__file__)