Plugin support

- Homebridge is now designed to be `npm install`d globally and
executed via "homebridge" script
  - Remove all specific accessories/platforms except for an example
  - New internal structure and "cli"

lib/user.js

@@ -0,0 +1,35 @@
+var path = require('path');
+var fs = require('fs');
+
+'use strict';
+
+module.exports = {
+  User: User
+}
+
+/**
+ * Manages user settings and storage locations.
+ */
+
+// global cached config
+var config;
+
+function User() {
+}
+  
+User.config = function() {
+  return config || (config = Config.load(User.configPath()));
+}
+  
+User.storagePath = function() {
+  var home = process.env.HOME || process.env.HOMEPATH || process.env.USERPROFILE;
+  return path.join(home, ".homebridge");
+}
+
+User.configPath = function() {
+  return path.join(User.storagePath(), "config.json");
+}
+
+User.persistPath = function() {
+  return path.join(User.storagePath(), "persist");
+}