RN: A wild YellowBox has appeared!

Summary:
Replaces the existing `YellowBox` with a modern one.

Here are the notable changes:

- Sort warnings by recency (with most recent on top).
- Group warnings by format string if present.
- Present stack traces similar to RedBox.
- Show status of loading source maps.
- Support inspecting each occurrence of a warning.
- Fixed a bunch of edge cases and race conditions.

Reviewed By: TheSavior

Differential Revision: D8345180

fbshipit-source-id: b9e10d526b262c3985bbea639ba2ea0e7cad5081

Author: yungsters

Libraries/ReactNative/AppContainer.js

@@ -127,4 +127,11 @@ const styles = StyleSheet.create({
   },
 });
 
+if (__DEV__) {
+  if (!global.__RCTProfileIsProfiling) {
+    const YellowBox = require('YellowBox');
+    YellowBox.install();
+  }
+}
+
 module.exports = AppContainer;