Removed unused code
Adds pysft dependency
Skeleton for supporting sftp.
Moves sftpUpload to client to handle configparsing.
Upload sftp.
sftp Upload support.
Support upload of fileEntities to sftp.
Adds sftp download Support.
Fix missing mimetype, fileSize, and externalURL for externalURLs before download.
Add all of the sftp tests.
Clean-up of commented code.
Makes credential storing in configFile same as R client.
Adds support for urlquoting and multiple storage locations.
Fixes names of variables
Fixes naming of variables.
Remove support for alternative uploadDestinations.
Add missing documentation field.
Merge pull request #179 from larssono/sftp

Sftp support