I was experimenting with the arduino as a keyboard. As I had many problems with the leonardo I aslo used the spparkfun pro micro which also caused many problems.
The jpg you attached is just a blank shield attached on top of an Arduino UNO. The author then use the shield to prototype the V-USB circuit.
I have some experience with V-USB on the Atmega328P chips. The library referenced is by Rancid Bacon and will NOT work without major changes on versions of the IDE > 1.0.6 so download and install 1.0.6 from here: Previous Versions IDE