Update react native plugin introduction, remove warning (#703)

Author: benvinegar

docs/integrations/react-native.rst

@@ -1,11 +1,11 @@
 React Native
 ============
 
-.. sentry:support-warning::
+React Native for Raven.js is a pure JavaScript error reporting solution. The plugin will report errors originating from React Native's
+JavaScript engine (e.g. programming errors like "x is undefined"), but might not catch errors that originate from the underlying
+operating system (iOS / Android) unless they happen to be transmitted to React Native's global error handler.
 
-    The React Native plugin is experimental, and not ready for production use.
-
- .. versionadded:: 1.3.0
+Errors caught via the React Native plugin include stack traces, breadcrumbs, and allow for unminification via source maps.
 
 Installation
 ------------