manually adapt few imports

gluon/sanitizer.py

@@ -10,11 +10,9 @@ Cross-site scripting (XSS) defense
 -----------------------------------
 """
 
-from HTMLParser import HTMLParser
+from ._compat import HTMLParser, urlparse, entitydefs
 from cgi import escape
-from urlparse import urlparse
 from formatter import AbstractFormatter
-from htmlentitydefs import entitydefs
 from xml.sax.saxutils import quoteattr
 
 __all__ = ['sanitize']