add platform windows to support wp8.1 and later
add platform windows to support wp8.1 and later

sangwonl/cordova-plugin-admob,erperejildo/cordova-plugin-admob,erperejildo/cordova-plugin-admob,M4E/cordova-plugin-admob,floatinghotpot/cordova-plugin-admob,Telerik-Verified-Plugins/AdMob,sangwonl/cordova-plugin-admob,Telerik-Verified-Plugins/AdMob,erperejildo/cordova-plugin-admob,sangwonl/cordova-plugin-admob,M4E/cordova-plugin-admob,M4E/cordova-plugin-admob,johnwerd/wallpapers,Jeremy017/cordova-plugin-admob,Jeremy017/cordova-plugin-admob,erperejildo/cordova-plugin-admob,sangwonl/cordova-plugin-admob,Jeremy017/cordova-plugin-admob,johnwerd/wallpapers,johnwerd/wallpapers,Telerik-Verified-Plugins/AdMob,M4E/cordova-plugin-admob,floatinghotpot/cordova-plugin-admob,floatinghotpot/cordova-plugin-admob,floatinghotpot/cordova-plugin-admob,johnwerd/wallpapers,Jeremy017/cordova-plugin-admob,Telerik-Verified-Plugins/AdMob