Signed-off-by: NYehuda Katz <wycats@Yehuda-Katz.local>

AC::Head now doesn't have an unfulfilled Rendering dependency, and instead works just fine standalone (which means that ConditionalGet also doesn't have a Rendering dependency)

Added ActionDispatch::Request#authorization to access the http authentication header regardless of its proxy hiding [DHH]

Added cookies.permanent, cookies.signed, and cookies.permanent.signed accessor for common cookie actions [DHH]

:to => redirect() can take a String using 1.9-style interpolation or proc that takes the path parameters as a Hash

adding any to the load path more than once.