Provides the following commands.
- `tab` create a new tab (works in both _Terminal_ and _iTerm_).
- `pfd` print current _Finder_ directory.
- `pfs` print current _Finder_ selection.
- `cdf` cd to current _Finder_ directory.
- `pushdf` pushd to current _Finder_ directory.
- `ql` quick look at files.
- `manp` Open MAN pages in _Preview.app_.
- `trash` Move files and folders to _Trash_.
