Passed in the BingKey as a parameter to WebMapViewModel.LoadAsync - this should stop prompting user for credentials when opening webmaps where the basemap is a Bing Map.
Fixed a passenger issue: removed unnecessary "if" statement from CreateIdentifyResultsLayer.
Merge pull request #52 from Esri/hisham_issue41_BingMapsCredentials

Passed in the BingKey as a parameter to WebMapViewModel.LoadAsync - this...