update readme and package.json

Author: geoffp

README.md

@@ -1,5 +1,4 @@
-## The Mustache engine for Pattern Lab / Node
+## The Handlebars engine for Pattern Lab / Node
 
-This one should be included by default with Mustache editions. If it's missing from your project for any reason, `npm install patternengine-node-mustache` should do the trick.
-
-On dev right now the command is `npm install pattern-lab/patternengine-node-mustache#dev`
+To install the Handlebars engine in your edition, `npm install patternengine-node-handlebars` should do the trick.
+ 

package.json

@@ -27,6 +27,6 @@
     "test": "grunt travis --verbose"
   },
   "engines": {
-    "node": ">=0.1"
+    "node": ">=4.0"
   }
 }