add basic two-way binding support for auto-bindings via the bindOneWay property

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>
need to make sure that observers interested in the addition of a model (e.g. data) will be notified

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>
do not render rows for models that aren't in the current dataset, call renderAllRows on data changes

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>