I just merged the xml_content branch to the main CVS trunk. I made some extensive testing to make sure everything works well, but of course it's possible I messed something up so please check it out.

Some minor notes:

• When a story or comment is modified, story.cache.modifytime is now set to the current time (while story.modifytime is only set on major updates) to signal that cached content parts should be re-rendered.
• I managed to fix the problem with setting the createtime of stories we mailed about a few days ago (Tobi and Robert).
• Robert: I kept the underscore separator for form parameter names because they're used us JavaScript property names sometimes, e.g. when checking if content_text is defined in the parameter object, and this wouldn't be so nice to do with colon separator. I don't mind going with colon though, if you prefer that.