ENH: Setting up esa, base template (#13)

Fixes #4

app/adapters/application.js

@@ -0,0 +1,12 @@
+import DS from 'ember-data';
+import ENV from '../config/environment';
+import DataAdapterMixin from 'ember-simple-auth/mixins/data-adapter-mixin';
+
+const { JSONAPIAdapter } = DS;
+const { APP: { API_HOST, API_NAMESPACE } } = ENV;
+
+export default JSONAPIAdapter.extend(DataAdapterMixin, {
+  namespace: API_NAMESPACE,
+  host: API_HOST,
+  authorizer: 'authorizer:application',
+});