ported some more stuff to py 3.3

removed init_jinja_globals hack from app.py after consulting mitsuhiko
(didn't work on py 3.3 "as is")

removed with_statement future imports, not needed any more

needs more work on 2.7 as well as on 3.3

flask/testing.py

@@ -10,12 +10,10 @@
     :license: BSD, see LICENSE for more details.
 """
 
-from __future__ import with_statement
-
 from contextlib import contextmanager
 from werkzeug.test import Client, EnvironBuilder
 from flask import _request_ctx_stack
-from urlparse import urlparse
+from flask._compat import urlparse
 
 
 def make_test_environ_builder(app, path='/', base_url=None, *args, **kwargs):