[Gemspec] Bump to Xcodeproj 0.19.4
[Gemspec] Bump to cocoapods-trunk 0.3.1
Indentation! Indentation! Indentation!

Indentation! Indentation! Indentation! Indentation! Indentation!
[ErrorReport] Include git information in stack

Closes https://github.com/CocoaPods/CocoaPods/issues/2678.