Better documentation of the implemented rules

[pedropaulofb]

First, congratulations for your work!

It would be nice if the implemented rules were better documented. Besides the code itself, the only information I could find about the rules is their source references. Which rules were implemented? Which design decisions had to be taken to adapt these rules from UFO to gUFO?

Having these informations in hand would make things easier for other researchers to use (reuse, adapt, improve, complement, etc.) this work.