Update readme

Author: dnwhte

packages/patternengine-node-nunjucks/README.md

@@ -1,8 +1,17 @@
-# STILL IN DEVELOPMENT (NOT AVAILABLE YET)
+# A Nunjucks engine for Pattern Lab / Node
 
-## The Nunjucks engine for Pattern Lab / Node
+## Installing
 
-To install the Nunjucks engine in your edition, `npm install patternengine-node-nunjucks` should do the trick.
+To install the Nunjucks engine in your edition, run `npm install patternengine-node-nunjucks`.
+
+## Supported features
+- [x] [Includes](http://patternlab.io/docs/pattern-including.html)
+- [x] Lineage
+- [x] [Hidden Patterns](http://patternlab.io/docs/pattern-hiding.html)
+- [x] [Pseudo-Patterns](http://patternlab.io/docs/pattern-pseudo-patterns.html)
+- [x] [Pattern States](http://patternlab.io/docs/pattern-states.html)
+- [ ] [Pattern Parameters](http://patternlab.io/docs/pattern-parameters.html) (Accomplished instead using native Nunjucks variables)
+- [ ] [Style Modifiers](http://patternlab.io/docs/pattern-stylemodifier.html) (Accomplished instead using native Nunjucks variables)
 
 Level of Support is more or less full. Partial calls and lineage hunting are supported. Nunjucks does not support the mustache-specific syntax extensions, style modifiers and pattern parameters, because their use cases are addressed by the core Nunjucks feature set. Pattern Lab's listitems feature is still written in the mustache syntax.
 
@@ -35,3 +44,7 @@ exports = module.exports = function (nunjucks, env) {
   });
 };
 ```
+
+## What Nunjucks features are missing?
+
+I have not yet figured out a way to support variables in pattern includes. I'm thinking it might be possible to use Nunjucks precompile feature to get the compiled partial name before returning it to Pattern Lab, but just a thought at this point.