Release Name: rfacebook

Notes: - changed mock_ajax support to work with new Facebook POST parameter (fb_sig_is_mockajax) - fixed problem for iframe apps where a user logged out and a new user logged in - added a get() method to FacepricotChain, so that XML elements whose names collide with String methods can still be accessed (for example, "zip" is a String method, but also an element of the users.getInfo response, so you can access zip with info.get(:zip)) - cleaned up some before_filter code for less extraneous log messages