Banner reloading after no ad.
Partial implementation of custom events.
Initial VAST implementation.
Merge branch 'vast' into interstitial_request_response. Interstitial custom events.
textAd, imageAd and MraidAd as interstitials.
VAST as video ads.
Interstitials from VAST.
Fixes for interstitial textAd.
Improve applyFrameSize method.
Add iAd custom event.
Correct tracking event names for VAST.
Fix for VAST videos.
Fixes for custom event banners, AdMob custom event banner.
Fixes for fullscreen custom events.
Fix for video HTML overlay.
Implement video HTML overlay clickThrough, overlay improvements.
Implement VAST interstitials.
Code cleanup (remove interstitial and video toolbars).
VAST video tracking.
VAST interstitial tracking, tracking fixes.