Change templating options for data-f-bind

[narenranjit]

I redid how templating works data-f-foreach to 'make it better', which also had the sideeffect for allowing to parse inline ejs. Change data-f-bind to match.

[mmrj]

note for testing: try this (from #91):

<div data-f-bind="Sales">
    <ul data-f-foreach="r in regions">
        <li><%= Sales[r] %></li>
    </ul>
</div>