Sometimes it's helpful to list the shortcuts you've added to help you
remember what they were. I had been doing `cat ~/.config/qcd/database`
for this, but it's nice to have it as part of the `qcd` command and also
to not have to type all that.

Include notes for the previous two releases and the current release in
progress.

Wasn't thinking about the fact that these helper functions get exposed
to the global namespace, which is _such_ a bad idea.

Rename these functions to something specific to the program to make them
harder to randomly come across and to have a better chance of not
overriding something that already exists.

* Enable installation via Homebrew on OS X.
* Update the README to describe how to use Homebrew to install.

This was our ideas file when implementing the new database supported
version of `qcd`. Now that it's working the way we wanted it to, this
ideas file can be removed.

Include a short description, example usage information, installation
instructions, and license information.

* COPYING file
* Copyright headers on source files

Assume we'll get these from the main `qcd` script as currently they're
sourced to the global environment. This way at least we're not repeating
those lines in two places.