Add Node.js version manager to bin folder
ls output is not to be sorted

According to the ls manpage on OS X, the -f option turns of sorting.
This, for some reason, causes the output to be collated properly w/
no respect to case (as desired).

For example, I used to get the following:

        .Trash
        .bin
        .dotfiles
        .mediakeys
        .vim
        .www

Now I get:

        .bin
        .dotfiles
        .mediakeys
        .Trash
        .vim
        .www
Rename /dev/null
Better _ls_ aliases
Sudo allow expansions
Smaller regexp to match '.' and '..'
Properly quote fn arguments
The abyss