A bunch of updates
A bunch of updates to various objects which were made as I was putting an actual site together using the framework.  Something is still broken in the server which is causing a 2nd request to be handled on 404s. The ConcurrentResourceRequest handler was also added which lets you batch up resource requests and run them concurrently.  Also of note, the Server code was updated so that the header writing does not conflict with middleware like express session handling.