better ISession interface

pyramid-interfaces.py

class ISession(IDict):
	...
	...
	...

    id = Attribute('String `id`')
    cookie_name = Attribute('String `cookie_name`')
    cookie_value_in = Attribute('String `cookie_value_in`')
    cookie_value_out = Attribute('String `cookie_value_in`')

	...
	...
	...

pyramid-session.py

    @implementer(ISession)
    class CookieSession(dict):
    ...
    ...
        def __init__(self, request):
        ...
        ...
            self.cookie_name = cookie_name
        ...
        ...

## would need to handle id, cookie_value_in , cookie_value_out

pyramid_beaker-__init__.py

def BeakerSessionFactoryConfig(**options):
    """ Return a Pyramid session factory using Beaker session settings
    supplied directly as ``**options``"""

    class PyramidBeakerSessionObject(SessionObject):
	    ...
	    ...
	    ...
	    ...

	    @property
        def id(self):
            return self._session().id

        @property
        def cookie_name(self):
            return self.key

        @property
        def cookie_value_in(self):
            return self.id

        @property
        def cookie_value_out(self):
            return self.id
	    ...
	    ...
	    ...