Xcode workspace origin
Merge pull request #231 from apiaryio/zdne/add-xcode-workspace

Xcode workspace origin
Add sourcemap related files to xcodeproj
Don't need more xcode workspace files than necessary
Merge pull request #232 from apiaryio/pksunkara/xcodeproj

Add sourcemap related files to xcodeproj
Merge branch 'master' of https://github.com/apiaryio/snowcrash into alikh31/lazyreferencing