Dukedsclient

Renamed `mail_draft` to `share`.
Renamed `handover` to `deliver`.
Includes changes to be compatible with the D4S2(formerly handover) service.

Adds remove_user command to remove a user from a project.
Also includes faster method of retrieving remote project contents.

Adds commands to `list` remote projects and `delete` them by name.
Adds `--include` or `--exclude` arguments to `download` and `handover` commands to just download or share part of a project.
Prints an error when user tries to run with a non-UTF terminal encoding.
Skips .DS_Store, .ddsclient and ._\* files when uploading. This is configurable via `file_exclude_regex` config file setting.
Adds `list_auth_roles` command to print out the possible auth_role values for use with `add_user`.

Support for downloading a file in parallel by default.
New ~/.ddsclient config file setting of 'download_workers' to configure this behavior.

Fix to allow downloading and uploading once breaking changes are committed.
Changes to support old and new format for json payload returned by GET files.