FTP storage fails if remote path not exists #47
Description
Unlike SFTP storage which creates folder and retries
https://github.com/astrails/safe/blob/master/lib/astrails/safe/sftp.rb#L29
FTP storage just prints uninformative message.
https://github.com/astrails/safe/blob/master/lib/astrails/safe/ftp.rb#L31