creating CGI_Impersonator in Webmacro-Spring env

Sebastian,
	I searched all the ContextTools code and found that
	CGI_Impersonator is the only class that needs to
	access ServletContext and it also assumes that
	the broker is a ServletBroker (see code below).

    		CGI_Impersonator(WebContext wc) {
       			requst_ = wc.getRequest();
       			// this is not very nice, but I don't see any other
       			// possibility to get the servlet context. We should
			// provide a method in WebContext to hide this from our users.
		      	sc_ = ((ServletBroker) wc.getBroker()).getServletContext();
    		}

	Without this problem, I think we can use a regular WM (i.e., not
	initialized with a ServletBroker) as the base for WebMacro engine in Spring.
	And we can use WebContext inside WebMacroView for servlet application and
	regular Context for other usages (e.g., email templates).

	Also, I think the main reasons for having Servlet20Broker/Servlet22Broker are
	to add few more places for locating property files, templates, and other
	resources and to use ServletContext.log(...) for logging purpose. They 
probably
	should be replaced by Spring-friendly ones, e.g.,  like the way your have
	implemented.

	So the question now is how to address the CGI issue. Comments?
Hai-Chen Tu




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