SFTP Support

This allows you to upload files to a SFTP server and simply return a URL to the image. This has the following configuration options: - Hostname - Defines the hostname of the SFTP server. - Port - Defines the port for the SFTP server. - Username - Defines the username for the SSH user. - Password - Defines the password for the SSH user. - Directory - Defines the directory on the server to upload the files too. - Base URL - Defines the base URL for the SFTP server. This will mean that when the URL is returned, it will be returned in the format of <base URL>/<filename>.