Allow mixed-case GUIDs
Merge commit '304a76e59c3d04ae488814112cf087db1f8f10b7'
- PBXResolver to resolve filenames for GUIDs
- Print comments with filename for GUIDs
- Index and resolve group names and build phases
- Add files getter to PBXBuildPhase
- Adjust output to better match with Unity expectations
Allow strings with "-", "/" to be serialized without quotes to workaround Unity bugs