Squashed commit of the following:

commit d1cdbfce97a5b7610043b1d173ef49e004b7db29
Author: Paul McNett <p@ulmcnett.com>
Date:   Thu May 23 22:11:02 2013 -0700

    Fix getDataSet() for virtual fields that need to requery children.

    Previously, there were two problems with getDataSet() and
    VirtualFields:

    1) If you named the field list, the virtual fields wouldn't be
       included.

    2) If your virtual field needs to requery children, it would show
       incorrect values .

    Both problems are fixed now.

commit d7016f0d5f09f5fc969c09b2692640f3c045141a
Author: Paul McNett <p@ulmcnett.com>
Date:   Wed May 15 15:59:05 2013 -0700

    Convenience: return the child reference in biz.addChild()

commit aeb5855981b96df1bf2f320bc479880a161605da
Author: Paul McNett <p@ulmcnett.com>
Date:   Wed May 8 18:12:44 2013 -0700

    Fix invoice progressControl demo bug in cancel.

    Thanks John Fabiani for pointing it out.
Release v0.9.11