Improve Analytics setup documentation

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.

.gitignore

@@ -29,3 +29,5 @@
 /android/ScratchJr/.idea/caches
 /android/ScratchJr/.idea/modules.xml
 ios/Pods
+google-services.json
+GoogleService-Info.plist

README.md

@@ -3,12 +3,12 @@ This is the official git repository hosting the source code for the
 [ScratchJr](http://scratchjr.org/) project.
 
 ScratchJr can be built both for iOS and Android.
-A pure-web version or Chrome-app version is planned to follow at some point in the future.
+A pure-web version is planned to follow at some point in the future.
 
 Platform | Status
 -------- | -------------
 iOS      | Released in App Store
-Android  | Released in Google Play and Amazon store
+Android  | Released in Google Play
 
 ## Release Schedule
 
@@ -50,6 +50,14 @@ Regardless of whether you are doing iOS development or Android development, you
 5. Run <tt>brew install imagemagick</tt> to install commandline `magick`
 6. In the top level of the scratchjr repo directory, install npm dependencies for bundling the JavaScript: <tt>npm install</tt>
 
+### Analytics
+ScratchJr uses the Firebase SDK to record analytics for the app. Scratch Team developers should look for
+the configuration files in the Scratch Devs Vault. If you're not on the Scratch Team, then you'll need to
+set up your own [app analytics](https://firebase.google.com/products/analytics) with Google Firebase. It's free.
+
+1. Place the `google-services.json` file in `editions/free/android-resources`
+2. Place the `GoogleService-Info.plist` file in `editions/free/ios-resources`
+
 ### iOS
 
 1. To build the iOS version, you need to have a Mac with XCode

ios/ScratchJr.xcodeproj/xcshareddata/xcschemes/ScratchJr Free.xcscheme

@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1130"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "D92D0F861C33381B00C573AD"
+               BuildableName = "ScratchJr Free.app"
+               BlueprintName = "ScratchJr Free"
+               ReferencedContainer = "container:ScratchJr.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "D92D0F861C33381B00C573AD"
+            BuildableName = "ScratchJr Free.app"
+            BlueprintName = "ScratchJr Free"
+            ReferencedContainer = "container:ScratchJr.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "D92D0F861C33381B00C573AD"
+            BuildableName = "ScratchJr Free.app"
+            BlueprintName = "ScratchJr Free"
+            ReferencedContainer = "container:ScratchJr.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>