Implemented the first route of the toResponse normalisationf for all classes

ref #67

src/models/entities/StatsClient.ts

@@ -1,5 +1,6 @@
 import { IsInt, IsOptional, IsString } from "class-validator";
 import { Column, Entity, PrimaryGeneratedColumn } from "typeorm";
+import { ResponseStatsClient } from '../responses/ResponseStatsClient';
 /**
  * Defines the StatsClient entity.
  * StatsClients can be used to access the protected parts of the stats api (top runners, donators and so on).
@@ -45,4 +46,11 @@ export class StatsClient {
     @IsString()
     @IsOptional()
     cleartextkey?: string;
+
+    /**
+   * Turns this entity into it's response class.
+   */
+    public toResponse(): ResponseStatsClient {
+        return new ResponseStatsClient(this);
+    }
 }