CocoaPods/Xcodeproj — pull request #49 by frisocki (2013-01-29 17:31:03+00:00)
Title: Allow PBXGroup as PBXFileReference Value

Xcode can create fileRef references to PBXGroup in the PBXBuildFile
section. This is known to happen when copying a directory from a
project template during new project creation.

Adding "PBXGroup."