Added FTP client LsCmd and FTP reply parse() function. List command initializes data port connection on a new socket. Then sends a directory list over the connection and ends the connection. Still need to output directory list to terminal.
Merge branch 'list'

Conflicts:
	FTPClient.cpp
	FTPClient.h
	ftp.cpp
Merge branch 'master' of github.com:dereklmc/ftp-client

Conflicts:
	ftp.cpp