react-native example app port (#223)

* add readme

* react-native example app

* update readme

* add ios-cli dep

* revert package.json change

* update readme

* update readme

* don't auto launch metro

* add react native scripts

* nohoist @react-native-community/**

* update readme

* undo wrong README change

* remove react-native root dep

* copyright headers

* semi-style

* add default gitignore

* finish linting

* remove test for now

* fix typescript errors

* fix linting

* update scripts

* update deps and version

* update readme

* remove accidental dep

* update readme

* bump deps

* update yarn.lock

* actually update yarn.lock

* fix yarn.lock conflicts by updating exampleReactNative deps

packages/exampleReactNative/android/app/proguard-rules.pro

@@ -0,0 +1,10 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /usr/local/Cellar/android-sdk/24.3.3/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here: