Add support for push

src/Adapters/Push/PushAdapter.js

@@ -0,0 +1,29 @@
+// Push Adapter
+//
+// Allows you to change the push notification mechanism.
+//
+// Adapter classes must implement the following functions:
+// * initialize(pushConfig)
+// * getPushSenders(parseConfig)
+// * getValidPushTypes(parseConfig)
+// * send(devices, installations)
+//
+// Default is ParsePushAdapter, which uses GCM for
+// android push and APNS for ios push.
+
+var ParsePushAdapter = require('./ParsePushAdapter');
+
+var adapter = new ParsePushAdapter();
+
+function setAdapter(pushAdapter) {
+  adapter = pushAdapter;
+}
+
+function getAdapter() {
+  return adapter;
+}
+
+module.exports = {
+  getAdapter: getAdapter,
+  setAdapter: setAdapter
+};