Use _NOTES_NOTES.
Add magic comment.
Work on autocomplete for showing.

First, show was always calling less_dir. That was fixed. Secondly, I needed to
use = not -eq for string comparision. And finally I should use -d for listing
only dates.
Add exists script.

This script checks to see if a project with the given name exists. If so it
writes to std out and exits with 0. Otherwise it writes to std err and exits
with 1.
Exists should write to std err.