Update README with link to Installation ...

... and link to @getsentry Twitter account.

Author: benvinegar

README.md

@@ -11,10 +11,14 @@ For on-premise users:
 * Raven.js [3.6](https://github.com/getsentry/raven-js/releases/tag/3.6.0) requires Sentry server 8.6.0 or later
 * Raven.js [2.0](https://github.com/getsentry/raven-js/releases/tag/2.0.0) requires Sentry server 8.0.0 or later
 
+## Installation
+
+To get started with Raven.js, please see [Installation](https://docs.sentry.io/clients/javascript/install/).
+
 ## Resources
 
  * [Download](http://ravenjs.com)
  * [Documentation](https://docs.sentry.io/hosted/clients/javascript/)
  * [Bug Tracker](https://github.com/getsentry/raven-js/issues)
  * [IRC](irc://chat.freenode.net/sentry) (chat.freenode.net, #sentry)
- * Follow [@mattrobenolt](https://twitter.com/mattrobenolt) on Twitter for updates
+ * Follow [@getsentry](https://twitter.com/getsentry) on Twitter for updates