Merge pull request microsoft#74 from microsoft/dev

merge dev to master for 1.0.0-b3

Merge pull request microsoft#71 from microsoft/users/tedchamb/suffix

Remove ` (dev)` version suffix in UserAgent string in master branch

Merge pull request microsoft#71 from microsoft/users/tedchamb/suffix

Remove ` (dev)` version suffix in UserAgent string in master branch

Merge pull request microsoft#56 from xuzhang3/addhttpstatuscode

return http statusCode within WrapperError