first attempt at doing XML parsing using ns_xml instead of the Tcl XML stuff. Not sure yet if this is faster, although we expect that it will be. Note also that there seems to be a bug right now in ns_xml where an XML comment will screw things up, so I've added a quick prepare function that takes out comments before XML parsing... I'm not happy about that.
Moved the bootstrap and installer stuff into their own mini-package, whichlet me clean up the loading of acs-tcl a bit and isolate all the bits ofAPM-knowledge required in the pre-acs-tcl bootstrapping process into a singleapm file. In general, bootstrap.tcl is cleaner and easier to read.
