For now, a shell
I started on doing one command call first, then saw a blog post about writing a shell, so I thought, why not do just that
This is then version one, a prototype with one alias
Will add a good prompt, line editing, history etc later, for now it is as simple as a shell can be, in C89 using goto if course
So should I do input as an array of chars and use the TERMIOS stuff for line editing? I don't want other dependencies than libc.