Updated DownloadSync method
Merge pull request #817 from Juliako/FixDownloadAsync

Updated DownloadSync method
Merge pull request #818 from mollybostic/master_local

fix merge conflict #810
MongoLab NodeJS Tutorial update -- Reformatting, revision, inclusion of environment variable config
Merge pull request #819 from esedor/master

NodeJS, MongoLab tutorial
fixing validation error in #819