update readme

Readme.md

@@ -4,6 +4,8 @@
 
 Slate is a completely customizable framework for building rich text editors in the browser. You can think of it like a pluggable implementation of `contenteditable`, built with React and Immutable. Slate was inspired by [Draft.js](https://facebook.github.io/draft-js/) and [Prosemirror](http://prosemirror.net/).
 
+_Slate is currently in **beta**, while work is being done on: cross-browser support, atomic node support, and collaboration support. It's completely useable, but you might need to pull request one or two fixes for your use case._
+
 ###### Table of Contents
 
 - [Principles](#principles)
@@ -18,12 +20,16 @@ Slate is a completely customizable framework for building rich text editors in t
 - Doesn't bake any opinions about the schema being edited into the core library.
 - Designed to allow for collaborative editing to be layered on top.
 
+
 ## Examples
 
-To get a sense for how Slate works, check out a few of the examples:
+To get a sense for how you might use Slate, check out a few of the examples:
 
 - Rich Text
 - Plain Text
 - Auto-markdown
 - Links
 - Tables
+
+
+## Getting Started