Publish Vulpes Preview 15 sources for desktop, Android and Tundra

Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.

gaia/apps/calendar/js/backend/provider/factory.js

@@ -0,0 +1,27 @@
+define(function(require, exports) {
+'use strict';
+
+var debug = require('common/debug')('provider/factory');
+
+var ctors = {
+  Caldav: require('./caldav'),
+  Local: require('./local')
+};
+
+var providers = exports.providers = Object.create(null);
+
+exports.get = function(name) {
+  if (!providers[name]) {
+    try {
+      debug(`Initializing provider ${name}`);
+      providers[name] = new ctors[name]();
+    } catch (e) {
+      console.error('Error', e.name, e.message);
+      console.error('Failed to initialize provider', name, e.stack);
+    }
+  }
+
+  return providers[name];
+};
+
+});