Updated setup / added datetime test

setup.cfg

@@ -0,0 +1,15 @@
+[aliases]
+# python2.7 has upgraded unittest and it is no longer compatible with some
+# of our tests, so we run all through nose
+test = nosetests
+
+[nosetests]
+verbosity = 2
+detailed-errors = 1
+with-coverage = 1
+#cover-html = 1
+#cover-html-dir = ../htmlcov
+cover-package = mongoengine
+cover-erase = 1
+where = tests
+tests = bugfix, connection, dereference, django_tests, document, dynamic_document, fields, queryset, replicaset_connection, signals