Error Panel Formatting

I changed the error panel to be a little easier to read. I made the second line contain the relevant line from the file, if it is already open. I'm not sure how we would do it quickly if the file isn't already open. 

This pull request includes the osx one because I couldn't work without it. Please review the other one first. 

![screen shot 2013-09-05 at 12 17 50 pm](https://f.cloud.github.com/assets/16249/1090473/7ccabe0c-1657-11e3-912f-337097876355.png)