Test that subgroups that reflect the directory structure are not created for
a file reference unless requested.

When adding a file reference for a file in a *.lproj folder, use a
variant group to group it with corresponding files for other languages.

Grouping is done by the names without extensions of the files inside the
*.lproj folders.
For example: Base.lproj/Foo.storyboard and de.lproj/Foo.strings will
be put together in a variant group called Foo.

Update Xcodeproj and support .hxx headers

improving the performance of Pod::Installer::Analyzer#generate_pod_targets

improving Pod::Installer::Analyzer#deduplicate_targets performance, by avoiding computing previously computed dependency trees

Only open the user project once per installation

Fixing rake's Inch

requiring colored early so that String's ancestor will have Term::ANSIColor later, which contains the color definition required by inch

[IntegrationSpecs] Update for adding podfile checksums to the lockfile

[Resolver] Fix resolution on Ruby 2.3

Closes #4332

Updating changelog

[XCConfig Helper] Only link dynamic vendored frameworks and libraries

Implemented logic to add linker flags for only dynamic vendored frameworks and libraries of pod dependencies.