Add support for "new-style grids" and "model master views".

Finally, an API that makes some sense...  We don't yet have feature parity
with the old-style grids and CRUD views, but this is already a significant
improvement to the design.  Still needs a lot of docs though...

tailbone/forms/__init__.py

@@ -25,7 +25,7 @@ Forms
 """
 
 from .simpleform import *
-from .alchemy import *
+from .alchemy import AlchemyForm
 from .fields import *
 from .renderers import *
 

tailbone/forms/alchemy.py

@@ -31,9 +31,6 @@ from pyramid.renderers import render
 from ..db import Session
 
 
-__all__ = ['AlchemyForm']
-
-
 class AlchemyForm(Object):
     """
     Form to contain a :class:`formalchemy.FieldSet` instance.