Include title in html.
Fix in testrunner: Use relative url for jquery.
Refactoring: Add PositionSnapshot class.

 * Preparation for game history tracking.
Use toEqual for arrays instead of string conversion.
Start & stop server automatically in ft.
Implement history support + back button.

 * This goes along with various refactorings.
Move binding of buttons to ButtonPanel.
Suppress hover effect for disabled buttons.
Feature: Implement forward button.
Tests: Clarify expectations for GamePosition unittest.
Refactoring: Rename GamePosition to Game.