Implement 'rgrep' tool that greps recursively and lets you jump right to the grepped results.

This was inspired by Emacs' `rgrep` tool, and it mostly works, but it isn't as nice. Some flaws:

 * Can't display any colourization of the output like Emacs would (harder to read)
 * Once you click on one option, the menu goes away, so if you want to view two files from the grepped results, you have to run it a second time. 
 * Has a bug where it also opens an empty new document every time you run it. Haven't been able to figure out why yet.

In spite of this, it does *work*. You can grep through large source trees and then jump straight to the exact line of the exact file that matched. Anyway, this was just an idea that I had. Maybe you can take a look at it ;-)