New Plugin API

- Homebridge calls single exported initializer function and passes an
API object
  - No more require() for HAP classes (doesn't play well with plugin
structure)

package.json

@@ -29,6 +29,7 @@
   },
   "preferGlobal": true,
   "dependencies": {
+    "chalk": "^1.1.1",
     "commander": "2.8.1",
     "hap-nodejs": "0.0.2",
     "semver": "5.0.3"