Adds new nuke toy

Nuke toy with my first sprite work ever (just trying to mimic the nuke but in a smaller size, while also making it look like a toy)

Nuke toy will play ```'sound/machines/Alarm.ogg'``` to anyone around it when attack_self'd, with a 5 minute cooldown.

Also adds nuke toy to arcade prize list

![nuketoyidle](https://f.cloud.github.com/assets/5211576/1860141/2916370a-77af-11e3-9cb0-b389068569d2.png) ![nuketoy](https://f.cloud.github.com/assets/5211576/1860143/2e1a67da-77af-11e3-8165-96348f76beb2.gif)