Update README.md
Fix: Support attribute name for PBXReferenceProxy
[plutil] Check exact path where `plutil` is expected, not `$PATH`.

Fixes https://github.com/CocoaPods/CocoaPods/issues/2502.
[Project] robustness for #recreate_user_schemes
Merge pull request #191 from CocoaPods/fabio/fix-project-recreate-user-schemes

[Project] robustness for #recreate_user_schemes
[bundle] update
Bump to 0.19.2
Correctly support -force_load in linker flags.
Merge pull request #195 from CocoaPods/force-load-fixes

Correctly support -force_load in linker flags.
[PlistHelper] First version of old C ext ported to use Fiddle.

This means we link against the real CoreFoundation framework, but there
is no need for C ext compilation.
[PlistHelper] Replace deprecated CoreFoundation APIs.
[PlistHelper] Use actual signatures for all CF functions.
[PlistHelper] Refactor importing CF functions.
[PlistHelper] Cleanup function definitions.
[PlistHelper] Re-organize and clean-up more.
[PlistHelper] Re-organize a bit more to reduce namespace noise.
[PlistHelper] Merge and clean-up tests.
[PlistHelper] Make tests green and remove XML fixture.
[PlistHelper] Make rubocop happy.
Remove any further reference to the CFPropertyList and libxml-ruby gems.