Changeset [27cf82e1d34a42032b0b1a1e4c36be1c716a05be] by Brian Donovan

Use our internal setter while initializing to make sure arrangedObjects is properly observable.

This fixes both the case I reported earlier (#1174) and a new issue I found where attempting to bind to a CPArrayController's arrangedObjects before calling -setContent: would throw this exception:

Uncaught CPInvalidArgumentException: Unsupported method on CPArray

The reason for this exception is that the old implementation set arrangedObjects to an instance of CPJavaScriptArray, whereas the new one will set it to a _CPObservableArray.
https://github.com/280north/cappuccino/commit/27cf82e1d34a42032b0b1...