view: don't rely on Spiel being initialized on View init

should fix race condition, making game crash when BoardRenderer got initialized too early
view: set stone state to IDLE after commit

should fix NullPointerException, when still receiving move events after
stone has been set
replaced linked list in Turnpool with ArrayList

should fix StackOverflow when serializing, makes Turnpool much more simple
version 0.0.1_pre11