removed generic imports (.*)
removed websocket related modules

* flint-serve and flint-fx-websocket were a proof of concept,
  it works fine but we don't have any use case for it right now,
  so having to adapt this as well takes too much time for now.
flint-cli: changed some syntax to java7-style
flint-epub to use timed-validation & bugfix fx
tidy-up after rebasing