feat(data): add basic methods of data provider

Related to #1

src/app/modules/data/data.module.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018, 2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -17,6 +17,7 @@ import {HttpClientModule} from '@angular/common/http';
 import {NgModule} from '@angular/core';
 import {FormsModule} from '@angular/forms';
 import {IonicModule} from '@ionic/angular';
+import {StorageModule} from '../storage/storage.module';
 import {DataRoutingModule} from './data-routing.module';
 import {DataProvider} from './data.provider';
 import {DataDetailComponent} from './detail/data-detail.component';
@@ -48,6 +49,7 @@ import {EventListItemComponent} from './types/event/event-list-item.component';
     FormsModule,
     DataRoutingModule,
     HttpClientModule,
+    StorageModule,
   ],
   providers: [
     DataProvider,