Added instructions to the README for how to get the google services configuration files for analytics. Removed (and ignored in future) the empty config files. Note: empty folders are ignored in git, so added an empty file `.exist` to the android folder so that it will be there as a place to hold the actual google services file.
Finally added the xCode scheme for the app that you need for newer versions of xCode.
More clean up of unecessary files/folders.
.idea folder at top level (current one is in android/Scratchjr
.settings/.project/.esformatter leftover files from other IDEs and tools
Added notes to the README to clarify what folder/file to open in XCode or Android Studio