Moved code into lib
Added FakeServer#stop
In README, Note that TLS + active mode is not supported
server reply for pwd is 257, not 250.  257 is required by RFC 959
Added references to README
Respond with "450 No such file or directory" upon delete of missing file
NOOP errors if argument given
PASS gives syntax error if password is missing
USER gives syntax error if paramter missing
Correctly line endings when fetching a windows ASCII file
quit issues syntax error if a parameter is given
syntax error when mode parameter missing
syntax error when stru parameter missing
Added emacs # files to .gitignore
Remove incorred format code
Added cucumber tests