added support for command line arguments and comments
increased number of arguments supported
added syscalls fork() and execvp() as well as built-in exit command
added initial ls code
added syscall stat()
added proper -test argument
Improved token parsing and added command struct
Split shell() into shell() and execute()
added initial redirection support
fixed some permissions problems
redirection now works on existing files
added initial piping attempt, definitely not working
fixed piping and zombie processes
fixed some memory leaks
Merge branch 'ls'
Merge branch 'cp'