Handle task relations the right way (#36)

src/services/taskRelation.js

@@ -0,0 +1,15 @@
+import AbstractService from "./abstractService";
+import TaskRelationModel from '../models/taskRelation'
+
+export default class TaskRelationService extends AbstractService {
+	constructor() {
+		super({
+			create: '/tasks/{task_id}/relations',
+			delete: '/tasks/{task_id}/relations',
+		})
+	}
+	
+	modelFactory(data) {
+		return new TaskRelationModel(data)
+	}
+}