Demo of Multiple Widgets using different Datastores

# DEMO: Multiple DataStore implementations with dojo.data aware Widgets

### Description:

This simple demo shows how widgets which know only the dojo.data interfaces can work with data sources of varying formats. In this case an OpmlStore and a ItemFileReadStore are used to house the same data in different formats.

> ### Widgets using OpmlStore:

> > ComboBox:
> > Tree:

> ### Widgets using ItemFileReadStore:

> > ComboBox:
> > Tree: