3.0 - Proxy methods and properties in Table from the Association class

[lorenzo]

As it is not possible to do $posts->Authors and it returns the association object, it will be needed all methods and properties (other associations) to be proxied directly from the Association class. This will complete the duck typing for the association class and make much more useful to work with.

Only proxy methods that are not already implemented in Association, such as find and save.

[markstory]

Should the property proxies be read only? We have had problems in the past with array properties and proxies.

[markstory]

Pull request merged.