See https://bugs.ruby-lang.org/issues/6702

With the change in 0.16.3, which disabled flattening for zip files
some pods seem to break. While the rationale for the flattening
change is a good one, it would be nice to reenable flattening support
explicitly in the source configuration for your pod.

references https://github.com/CocoaPods/CocoaPods/issues/812

Fix a few typos in the test messages

Add support for Core Data model

Added support to compile Core Data model files before adding to the app bundle.

Do not flatten the zip files downloaded via http

Fix #757

This applies when the deployment target is set to < iOS 6.0 or
OS X 10.8, or not specified at all.

Fix podspec in Podfile with no options.

Added specs to test podspec method inside Podfile. Specs for the
default, no options version; the :name version and the :path
version.

Added support for pre-download over Mercurial.

Quote storyboard and xib paths

This time with proper escaping.

Small README.md update