Update comments and readme

Author: dnwhte

packages/patternengine-node-nunjucks/README.md

@@ -4,7 +4,7 @@
 
 To install the Nunjucks engine in your edition, `npm install patternengine-node-nunjucks` should do the trick.
 
-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.
+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.json data does not appear to be accessible. However, it's still possible to create custom list style data.
 
 ## Extending the Nunjucks instance
 

packages/patternengine-node-nunjucks/lib/engine_nunjucks.js

@@ -1,11 +1,22 @@
 /*
-  TODO
-  - Make sure regex match Nunjucks features and syntax
-  - Look into if we need to handle partials in the render method
-  - Test methods of including files
-  - Compare features and syntax with the mustache version so we can document
-  - Document and submit to PatternLab
-*/
+ * Nunjucks pattern engine for patternlab-node
+ *
+ * Dan White.
+ * Licensed under the MIT license.
+ *
+ */
+
+/*
+ * ENGINE SUPPORT LEVEL:
+ *
+ * Mostly 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.json data does not appear to be accessible.
+ * However, it's still possible to create custom list style data.
+ *
+ */
 
 "use strict";