Adds VS App Center analytics + crash reporting

Currently tracks install, refresh, and update app events.

Pods/AppCenter/AppCenter-SDK-Apple/iOS/AppCenter.framework/Modules/module.modulemap

@@ -0,0 +1,13 @@
+framework module AppCenter {
+  umbrella header "AppCenter.h"
+  
+  export *
+  module * { export * }
+  
+  link framework "Foundation"
+  link framework "CoreTelephony"
+  link framework "SystemConfiguration"
+  link framework "UIKit"
+  link "sqlite3"
+  link "z"
+}