Merge branch 'delete-record-method' of https://github.com/MariiaPunda/angular2-jsonapi into MariiaPunda-delete-record-method

Author: ghidoz

src/services/json-api-datastore.service.ts

@@ -75,6 +75,13 @@ export class JsonApiDatastore {
         .catch((res: any) => this.handleError(res));
   }
 
+  deleteRecord<T extends JsonApiModel>(modelType: ModelType<T>, id: string, headers?: Headers): Observable<Response> {
+    let options: RequestOptions = this.getOptions(headers);
+    let url: string = this.buildUrl(modelType, null, id);
+    return this.http.delete(url, options)
+        .catch((res: any) => this.handleError(res));
+  }
+
   peekRecord<T extends JsonApiModel>(modelType: ModelType<T>, id: string): T {
     let type: string = Reflect.getMetadata('JsonApiModelConfig', modelType).type;
     return this._store[type] ? this._store[type][id] : null;