[Gemfile] Update xcodeproj
[Spec][Integration] Fix specs

Approve change of missing 'showEnvVarsInLog: 1' for the generated shell script build phases. Ensure a consistent alphabetical order for build settings.
[Spec][Fixtures] Touch Imaes.xcassets with Xcode 6
[Spec] Make bundle_spec agnostic to resource order
[Spec][Fixtures] Add folder 'Cats' and nested resource 'GrumpyCat' to asset catalog
Discover nested resources in asset catalogs
[Spec][Integration] Ignore DerivedData
[Spec][Integration] Updated build for Xcode 6
[Spec][Integration] Add test for nested xcasset resource to build

Starring again: … GrumpyCat. 🐈
[Refactor] Change signature of BaseResourcesAnalyzer#build_section_data
Prefix nested resources with folder names
[Refactor] Reduce nil checks in Analyzer subclasses
[Spec][Integration] Approve change of removed image section for test build-keyword-clash