Update README.md

upgrade: chat demo;

new: unit tests; fix: exception handling;

update: requestType to static class; reconnect on client;

new: documentation;

better task management;

better task management

refactor: methods;

chatui

rename: Hub to Service;

rename: websocketfacade to websocketservice; new: extendability of websocketservice for ondisconnected and onconnected methods; new: user can specify path and which websocketservice type will be injected to middleware on request.

new: project location;

rename: sample app project; update: readme;

fix: viewmodel changes; new viewmodelstate class; fix: tasks

fix: name in messageDTo; new: context in connection instead of other;