CSHARP-1489: Add more tests for GridFSSeekableDownloadStream.

Author: rstam

README.md

@@ -116,5 +116,6 @@ Please see our [guidelines](CONTRIBUTING.md) for contributing to the driver.
 * staywellandy              https://github.com/staywellandy
 * Testo                     [email protected]   
 * Bar Arnon                 https://github.com/I3arnon
+* Rich Quackenbush          [email protected]
 
 If you have contributed and we have neglected to add you to this list please contact one of the maintainers to be added to the list (with apologies).