Icons not optimal for Retina display Macbooks

[nullvoids]

On Apple devices that have retina displays, the chevrons that are used for tab switching are not crisp. Not sure if this is a brogrammer issue or sublime text issue

[natemwilson]

Seems to be a brogrammer issue - the pngs in the main project directory are too small. I tried replacing them with some higher res ones on that I made on my machine, but they didn't scale correctly.