[Radiant] Filters within filters

[Chris Parrish]

I just noticed that nesting pages will apply the external filter on top 
of the internal one.  For instance, I set up a page like so:

Part: body, Filter: markdown
<r:content part="another_part" />


Part: another_part, Filter: none
<script>
  //!<[CDATA[
    my script content
  //]]>
</script>


The output is:
<script>
  //!&lt;[CDATA[
    my script content
  //]]&gt;
</script>


Is this desired?  I would have hoped to have my unfiltered page part get 
rendered, well, unfiltered.  Thoughts anyone?

-Chris