CocoaPods/Specs — pull request #2883 by barooo (2013-07-09 16:20:52+00:00)
Title: Update Airbrake-iOS podspec header search paths

This updates the podspec for Airbrake-iOS so it can find the tree.h header from libxml2.

This issue explains the problem:
https://github.com/CocoaPods/CocoaPods/issues/1141