Adding support for VAST XML tags and OpenX JSON ad responses. MPAdServerCommunicator will try and parse the response data as VAST XML/OpenX JSON if the ad configuration is null after trying to parse data with MoPub headers.
Adding MoPub Custom Event class for YuMe SDK.
Fix to MoPub MRAID support when after expanding an MRAID banner, the ad shows a modal view (e.g. open URL in a web view). Previously, the modal view would be shown behind the expanded ad, and the ad would not properly return to its superview when closed. Now,  expansionContentView will close and be removed from the keyWindow before showing the modal view and, once the modal view is closed, expansionContentView will be re-added to the keyWindow and expanded.