expanding refsScope to be accessible through scope.vars

#103

This:

    <h2>*foo: {{*foo}}</h2>
    <label>
        *foo: <input value:from="*foo" on:input:value:to="*foo">
    </label>

can now be done like this:

    <h2>scope.vars.foo: {{scope.vars.foo}}</h2>
    <label>
        scope.vars.foo: <input value:from="scope.vars.foo" on:input:value:to="scope.vars.foo">
    </label>

Using *foo and {{>*self}} are also deprecated in favor of this new syntax.