Added delete and rename functions.

Added functions ftp_{pasv,size,mdtm,fget,fput}
PASV mode is now supported; file size and last-modified time can now
be fetched from servers that support them; files now may be stored to and

Added functions ftp_{pasv,size,mdtm,fget,fput}
PASV mode is now supported; file size and last-modified time can now
be fetched from servers that support them; files now may be stored to and
retrieved from open files, in addition to disk files.

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Added optional port argument to ftp_connect()

Replaced ftplib because of incompatible license.

added ftp_pwd() ftp_cdup() ftp_mkdir() and ftp_rmdir()

added ftp_systype() and ftp_listraw() functions

Added rudimentary FTP support.