Adding a rule to prevent the queen from moving first and adjusting the new game dialog accordingly.

Introducing some memeory problems though.
Fixing a segfault when calling the ai.

Have to call the alphabetasearch with a reference to a pointer to a move
when I delete the move and create a new one.
Adding a message to the main scene while the ai is thinking
Bugfixing in the AI

- Adding missing {} that werde resposible for the AI sometimes moving
  the wrong color
- Removing the player boolean, since we have whose_turn.