Category browser on AotW

Many of you asked for a specific feature for Ads of the World. The ability to create complex queries. For example all Automotive Print ads from Asia. Before you could only select one vector. Either Automotive, Print or Asia. Now you can mix and match as you like using Category Browser. For now it's only available for logged in users and you can find a link to it under your account.

It's a very server intensive feature, so we have to run it in beta for some time before we can be sure it's stable. Please test it and let me know if it works correctly. Thank you!