[qt-board] rename event data classes
[qt-board] handle ptree exception on actor creation
[qt-board] change player creation

- added json config for each player;
- create player in separate method;
[qt-board] add class Graph
[qt-board] add post_init methods into actor components
[qt-board] store graph object in GameLogic
[qt-board] store graph object in GraphComponent
[qt-board] add method ActorComponent::owner
[qt-board] remove hack with possible moves from GraphComponent
[qt-board] implement GraphComponent::post_init