Support transforming script tag bodies in .htm/.html files?

[platinumazure]

Wondering if we should support transforming <script> tag bodies in .htm/.html files. Not important for now, certainly not going to look at this until after 1.0.

One possible approach:

1. Add an HTML/XML parser;
2. Have processFile detect HTML and switch to using that parser;
3. Anything in tags matching XPath //script[type="text/javascript"] would be passed to the recast parse/transform/print flow.