Added more emulators and icons to menu

Added more emulators like PSX, Commodore 64 and ScummVM. Added different icons for each emulator too. Thanks, Conno123009
![pimame](https://f.cloud.github.com/assets/5257675/1990655/5dd4bc24-8488-11e3-8fb5-5ce0d8abef72.png)