Add stage config defaults

Allow state configuration items set to prompt to have default values.
Clone stage

Add ability to clone stages (similar to clone project).
Hide detauls rails tasks when :webistrano present

Hide the default rails tasks when the :webistrano namespace is present.
Login users per role

Allow custom userids to be specified and used instead of of relying on
the project/stage setting.
Default hosts to closed

Default the host list to 'closed' as it can get quite long.
Add to default role names
Add new user link to top
Add new host to top
Add new recipe to top