Add an executable script to run the application.

Since I'm so incurably lazy, and almost as incurably tied to the command line, I added a quick script that allows to run the application directly from the command line \o/

Also, I added a README to set the ground for documentation. And to remember my future self how to run the application, as I'll probably forget how to do that tomorrow :smiley_cat:

The `.gitignore` has just the basic stuff to not let my cruft slip into the project, but will probably grow soon. Oh my...

Just some very simple stuff, but I'm too tired to do more today - let's see if tomorrow is more gentleman... :wave: