added test for onload being called, as well as multiple local overlapping calls in async mode
added test for onload being called, as well as multiple local overlapping calls in async mode

ollie314/cordova-mobile-spec,ollie314/cordova-mobile-spec,corimf/cordova-mobile-spec,corimf/cordova-mobile-spec,polyvi/xface-mobile-spec,apache/cordova-mobile-spec,polyvi/xface-mobile-spec,ollie314/cordova-mobile-spec,polyvi/xface-mobile-spec,apache/cordova-mobile-spec,corimf/cordova-mobile-spec,ollie314/cordova-mobile-spec,apache/cordova-mobile-spec,ollie314/cordova-mobile-spec,apache/cordova-mobile-spec,corimf/cordova-mobile-spec,corimf/cordova-mobile-spec,apache/cordova-mobile-spec