Merge remote branch 'hmarr/v0.4'

Conflicts:
	tests/fields.py

tests/fields.py

@@ -699,7 +699,7 @@ class FieldTest(unittest.TestCase):
         Event.drop_collection()
 
     def test_ensure_unique_default_instances(self):
-        """Ensure that every field has it's own unique default instance."""
+        """Ensure that every document has it's own unique default instance."""
         class D(Document):
             data = DictField()
             data2 = DictField(default=lambda: {})

tests/queryset.py

@@ -1314,6 +1314,8 @@ class QTest(unittest.TestCase):
     
     def test_q_with_dbref(self):
         """Ensure Q objects handle DBRefs correctly"""
+        connect(db='mongoenginetest')
+
         class User(Document):
             pass