More Py2Py3 compatibility

Author: Robert Damas

src/Discover.py

@@ -3,7 +3,11 @@
 
 from __future__ import print_function
 
-from . import Helper
+try:
+    from . import Helper
+except:
+    import Helper
+
 import re
 import sys
 

src/Helper.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Helper functions to capsule Python2/Python3 differences
+# Depends: smartctl
 
 import json
 import subprocess

src/SmartInfo.py

@@ -3,7 +3,10 @@
 
 from __future__ import print_function
 
-from . import Helper
+try:
+    from . import Helper
+except:
+    import Helper
 
 import os
 import stat