The string files in this directory are generated from a partner project (currently ios_strings) which tracks Xcode framework strings accross whatever versions of Xcode and physical devices we have time to process. (String translations for a given key/language change over time). 

Just one version of Xcode's strings in JSON format compresses to 130MB, so it would be detrimental to add the database to the main project.

cf.json indicates *which* strings we want to compile and make available to the provider.
