RC1.12

Features:
• Added mediation support for Google Play Services (as an alternative to AdMob).
• Added support for Android Advertising ID: call Settings.setAAID(String aaid, boolean limitAdTrackingEnabled) before making calls to loadAd to pass the AAID in the ad request.
• Added new project in extras/AndroidAdvertisingID, a convenience package for developers to retrieve the AAID. Usage in AndroidAdvertisingIDUtil.java
• Split 'mediatedviews' project into separate network-specific library projects (still under /mediatedviews/ directory) to allow developers to choose which mediation networks they want. Note that 'AdMob' and 'GooglePlay' are mutually exclusive due to conflicting namespaces.
• Added clearCustomKeywords function to public API
• Added destroys() function to MediatedBannerAdView to be implemented in adaptors (see MediatedBannerAdView.java)
• Improved mraid workflow to allow for delayed invocation of mraid.js.

Bug Fixes:
• Cleaned up a leaked BroadcastReceiver in mraid code.
• Resolved in-app browser closing on screen rotations
• Fixed crash due to WebViewChromium code when using WebViewClient.getHitTestResult().
• Resolved an issue with loadAdOffscreen() workflow making an invalid call to fail() after succeeding.