Disable html escaping (#288)

Author: rafalniski

src/main/java/com/contentful/java/cda/ResourceFactory.java

@@ -107,6 +107,7 @@ static <T extends CDAResource> List<T> fromArrayToItems(CDAArray array) {
   public static Gson createGson() {
     return new GsonBuilder()
         .registerTypeAdapter(CDAResource.class, new ResourceDeserializer())
+            .disableHtmlEscaping()
         .create();
   }
 }