Note the instructions listed - due to Reeder's using of different icons for "empty" and "full," you'll have to do some poking around in the application package.
I made a few ios7 icons to add to the set. They're inspired by all those great icons from Arn0, and made in a similar style. I'm no graphics guru, so they're not spectacular, but they work.
FYI: Some are left as *.png files, since I don't have to convert to *.icns when using LiteIcon.
Highlights: Office 2011; some stats apps; html & txt documents; Viscosity; Java; Citrix; Keka; Dragon Dictate; Digital Editions; and some other random stuff.
Anyway, figured I'd post in case someone finds a couple useful.
Here's a screenshot, because I'm too much of a slacker to post a nice preview like Arn0 or Humex