MS-425 MRAID 2.0 sizeChange event not fired.
MS-425 MRAID 2.0 sizeChange event not fired.

Use the creative seen sizes as the condition of firing the event
Removes the dependency on order of calls from the SDK.

8tracks/appnexus-mobile-sdk-ios,appnexus/mobile-sdk-ios,appnexus/mobile-sdk-ios,appnexus/mobile-sdk-ios,appnexus/mobile-sdk-ios,8tracks/appnexus-mobile-sdk-ios,8tracks/appnexus-mobile-sdk-ios,appnexus/mobile-sdk-ios,appnexus/mobile-sdk-ios,8tracks/appnexus-mobile-sdk-ios,8tracks/appnexus-mobile-sdk-ios