add readme

Readme.md

@@ -0,0 +1,21 @@
+
+# Slate
+
+Slate is a 
+
+
+## Principles
+
+- Build around a nested, recursive tree model just like the DOM, so that complex schemas are possible.
+- Make plugins a first-class consideration, so that almost all the logic is customizable.
+- Don't bake any opinions about data types and schema into the core library.
+
+## Examples
+
+To get a sense for how Slate works, check out a few of the examples:
+
+- Rich Text
+- Plain Text
+- Auto-markdown
+- Links
+- Tables