New Feature: Minor Robbery Enhancements

This is a copy of PR #3971 targeted at the dev branch.

This PR adds two features:

Cash Bags: Can be used to carry large amounts of cash/coins.
![Cash Bag Image](https://f.cloud.github.com/assets/2754163/1607654/b6014a10-5496-11e3-8d36-e043cfc62ae4.png)

Ability to emag ATMs: Causes sparks and money to fly out.

Not world-changing features by any means, but I didn't want to tackle anything major for my first time diving into the codebase. More information available on PR #3971. Also, is there a better way to merge changes to icons? I did it manually this time, but wasn't sure if there was some tool I should be using?