Add a failing test for Sort
Collection<T> is just getting in our way, ditch it
Version bump to 4.3.0
User provided initial state for ReactiveAsyncCommands

ReactiveAsyncCommands when driven by an IObservable defaults initially
to reporting CanExecute as true before any events pass through the
canExecute observable.  This change keeps that default behavior, but
allows the user to change this default to false if appropriate.
User provided initial state for ReactiveCommands

ReactiveCommands when driven by an IObservable defaults initially
to reporting CanExecute as true before any events pass through the
canExecute observable.  This change keeps that default behavior, but
allows the user to change this default to false if appropriate.
Pass in the EventArgs when Command binding to an event

If an ICommand is bound up via ICommand, and the command parameter isn't
specified, instead of defaulting to 'null', use the EventArgs parameter.
Update README.md