Deprecate arraylist-add and arraylist-filter ArrayList has proven more useful as an augmentation class, relying on custom implmentations of mutation and filter in subclasses or host classes. As a low level class, modules shouldn't be adding things to the prototype that might not work or be applicable to a subclass. The standing recommendation is to subclass ArrayList or mix or augment it onto a class that would benefit from its APIs. ModelList is a good implementation for mutable ArrayList with events. Fixes #2528972 Fixes #2530387 Fixes #2530388

Detect non-native ES5 shims and fall back to our own. This avoids potential issues with libraries that shim native objects with broken implementations, like older Prototype and MooTools, and certain Twitter widgets. The technique used to detect native methods isn't perfect, but works in all modern browsers and has minimal consequences if it fails.

Support sparse arrays correctly in the non-native Y.Array.indexOf() and Y.Array.lastIndexOf(). [Fixes #2530966]

Update readmes and history files. Holy crap how did I end up owning so many components?