Add dynamic node api

Closes #322
- nodes modules can be installed/removed dynamically at runtime
- nodes can be enabled/disabled
- onpaletteadd/onpaletteremove api added to node definitions
- initial implementation of nr-cli

package.json

@@ -43,7 +43,8 @@
         "uglify-js":"2.4.15",
         "nodemailer":"1.3.0",
         "imap":"0.8.13",
-        "request":"2.42.0"
+        "request":"2.42.0",
+        "colors":"0.6.2"
     },
     "devDependencies": {
         "grunt": "0.4.5",