Small Overhall - Look and feel

This evening I spent several hours doing a small overhaul of different aspects of Fasteroids. The game feels a bit more clean. It also sounds a bit more polished with different music between menu and gameplay. I realize the title and in-game music may not be to everyone's taste, so one of the future jobs will be to add a mute music option.

I also changed the volume of different things in game. The UFO entry sound was a bit too loud, it's a bit more subdued, but still noticeable. I amped up the "destroy" sound that comes from the dark circular UFO - though it may still be a bit quiet when compared to the in-game music.

At this point I'm not releasing the changes - I have some more polish I'd like to finish, but I really love where this is heading.