TiddlyServer 2.1

This is the beta release of TiddlyServer 2.1 A lot of settings have been changed and tree documentation is not complete, but the Readme should get you up and running. The basic concept is still the same, but some additional features have been added and the ServerConfig has been updated to reflect that. Most of this is the result of lessons learned with 2.0 and some additional features which I personally found useful.