Accounting roles widget for software plan version form

![screen shot 2014-02-06 at 5 15 06 pm](https://f.cloud.github.com/assets/716573/2105037/90129682-8f84-11e3-8169-79fde377ca94.png)
![screen shot 2014-02-06 at 5 14 46 pm](https://f.cloud.github.com/assets/716573/2105038/9021c666-8f84-11e3-9bb8-c3fd1c3a319c.png)