Cajole to HTML

Clone of http://codereview.appspot.com/61041 -- taking change from msamuel to submission.

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Rewrote HTML Compiler and HTML Sanitizer to output Javascript
and static HTML instead of just Javascript.

http://code.google.com/p/google-caja/issues/detail?id=294
Issue 294:   Caja produces pages that don't work if Javascript is disabled
    The problem is that, in order to preserve execution order
    properties, we emit HTML (and CSS?) as Javascript that builds the
    page.

    We need to also (optionally) output just the HTML and CSS in a
    <noscript> tag.

This makes two major changes:
  (1) Replaces HtmlSanitizer and HtmlCompiler with a mechanism that
      outputs a static HTML chunk and then reworks it to add dynamic
      attributes.
  (2) Added an ID suffix to PluginMeta so that containers which can
      avoid suffix overlap can move more rewriting to the static side.
      The new HtmlSanitizer and HtmlCompiler use that when rewriting
      attributes, and when present, no javascript is needed to emit
      CSS so a noscript version of a gadget will be properly styled.

The new Sanitizer and Compiler are based on the scheme described in
http://google-caja.googlecode.com/svn/trunk/doc/html/templates/TemplateCompiler.html
and can be extended to implement the entire template scheme.

[ihab.awad, 2009-06-01 23:52:55]

@3525