Updated docs to reflect validation changes

docs/tutorial.rst

@@ -161,8 +161,7 @@ object::
     john = User(email='jdoe@example.com', first_name='John', last_name='Doe')
     john.save()
 
-Note that only fields with ``required=True`` need to be specified in the
-constructor, we could have also defined our user using attribute syntax::
+Note that we could have also defined our user using attribute syntax::
 
     john = User(email='jdoe@example.com')
     john.first_name = 'John'

docs/userguide.rst

@@ -194,8 +194,7 @@ Documents instances
 ===================
 To create a new document object, create an instance of the relevant document
 class, providing values for its fields as its constructor keyword arguments.
-You may provide values for any of the fields on the document, but only
-**required** fields are necessary at this stage::
+You may provide values for any of the fields on the document::
     
     >>> page = Page(title="Test Page")
     >>> page.title