Use newer form of catching exceptions

autopep8 -i --select=W602
Also some other minor deprecated syntax changes, like "while 1".
I did not commit the less obvious changes.

modules/societegenerale/sgpe/pages.py

@@ -76,7 +76,7 @@ class LoginPage(SGPEPage):
 
         try:
             img.build_tiles()
-        except TileError, err:
+        except TileError as err:
             error("Error: %s" % err)
             if err.tile:
                 err.tile.display()