exclude testapp from PyPI package

Author: jrief

MANIFEST.in

@@ -4,4 +4,5 @@ recursive-include adminsortable2 *.py
 recursive-include adminsortable2/locale *
 recursive-include adminsortable2/static *
 recursive-include adminsortable2/templates *
+recursive-exclude testapp *
 recursive-exclude * *.pyc