renaming
removing TestValue, registering Move
refactoring Move from scala's enumration to simple ADT (trait & extending case subobjects) for better interoperability between scala jvm and scalajs (i.e. straightforward pickling)
playing against trivial AI (random move), game status refactored from scala enumeration to scala ADT (trait + case objects) which imitates enumeration and simplifies pickling
extract PicklingHelper to another file
extract WebSocketHelper to another file; enabling start button on ws connect
move missing code
code cosmetics