Pause Menu and Controller Support

So, today I implemented a pause menu.

It's a pretty simple pause menu, but let's you access the configs if you want and also permits you to return to main menu.

I also added controller support! Not that it's something difficult with dragonruby... what stopped me was only my negligence all along XD

For now, though, the only interaction you can have with the controller in the menu is pressing START. This will let you start and pause/resume the game.

I hope you enjoy!