Use 'synx' gem so the xcode groups link to folders

1) Why?
- The "folders" in Xcode are actually groups and not necessarily linked to a folder in Finder. This is why the folder structure you create in xCode doesn't appear in Finder or Github repo.
2) What is 'synx'
- A command-line tool that reorganizes your Xcode project folder to
  match your Xcode groups.
3) Resources
- http://stackoverflow.com/questions/18661305/folder-structure-in-xcode-vs-folder-structure-in-finder
- https://github.com/venmo/synx