Results 2 issues of Alexandru Margarit

Hello, First of all, thank you for this library ;) Just a quick one that fortunately has a fix but can be added to future updates: `new RushSearch().startGroup().whereIsNotNull("user").and().whereEqual("user", user).endGroup().orderDesc("created").find(AssetModel.class);` is...

Maybe the possibility to add sorting for a @RushList annotated field would lead to a more elegant code ? For a one to many relationship, currently I cannot think of...