T4 VarzServer implementation moved to another package and renamed from SImpleVarzServer to HttpVarzServer (because it's in library, not in sample code)
T4 refactoring of HttpServer to get is simplier
T4 Scala map method used to make JSON from varzs
T4 server port is now injected to server implementation
T4 HttpResponder now in separate file
T4 first _incomplete_ test of HttpResponder
T4 todo update
T4 big refactoring of HttpServer: using function as parameters, cleaning code, changing the way of managing the thread
T4 HttpServer uses thread pool now
T4 cleanup
Merge branch 'T4' into dev