AppStore version 1.13
MS-632 safer implementation of MRAID removeEventListeners
MS-636 valid MediationController cleared when no resultCB
MS-637 Improve consistency of AdFailed callback
MS-571 ANJAM clientside implementation
MS-655 Various fixes

Fix Interstitials being removed
MRAID supports and setOrientation fix
MS-655 Update Unit Tests
SDK Version 1.15
Merge RC1.15 to Github