WSDLTools.py -- just a few minor changes so the new schema class
		will be used instead of the schema tns placeholder.

		Might want to add an argument to WSDL.load method so that
                programmer can specify the placeholder or actual
		implementation.

        XMLSchema.py -- mostly new, unused original code is commented out at the bottom.

(which doesn't), so that SOAPpy can use wstools without needing ZSI
around...  which is kinda the point of generic common-code. :)

    class SOAPCallInfo:
    class ParameterInfo:
    class HeaderInfo(ParameterInfo):
    def callInfoFromWSDL(port, name):
Next step is to move what's left of wstools/ServiceProxy.py into the ZSI
module (and fix up the imports), so that wstools has *no* soap-stack-specific
code in it.