Troubleshoot when moving chips.
Added:
	* Can't stepover (double) if this is enemy's field

 Changes to be committed:
	modified:   bin/www
	modified:   node_modules/games.controller.js
	modified:   public/js/game/board.js
	modified:   public/js/game/bones.js
	modified:   public/js/game/game.js
	modified:   public/js/game/rules.js
	modified:   public/js/system.js