Improve speed on Python 3

This speeds it up quite a bit, but it's still running noticeably slower and I haven't figured out why yet.

Author: ikirudennis

textile/functions.py

@@ -20,7 +20,7 @@
 
 import re
 import uuid
-from sys import maxunicode
+from sys import maxunicode, version_info
 
 
 try:
@@ -232,8 +232,10 @@ def textile(self, text, rel=None, head_offset=0, html_type='xhtml',
         # characters.
         # we need to know if there are unicode charcters in the text.
         # return True as soon as a unicode character is found, else, False
+        # Python 3 is better equipped to handle unicode data, so this hackery
+        # is version-specific.
         self.text_has_unicode = next((True for c in text if ord(c) > 128),
-                                     False)
+                                     False) and version_info < (3,)
 
         if self.text_has_unicode:
             uppers = []