mojo-nes is licensed under the CERN OHL 1.2 license. You are free to study, distribute and make modifications to the Documentation, under the aforementioned license terms. You are also free to make cartridges derived from the Documentation for non-commercial purposes. If you want to make a commercial Product using this Documentation, please contact me to obtain a licence.
About CAD files
CAD design files are for KiCAD Open Source electronics design suite. Please install latest version along with KiCAD libraries to open it. When opening schematic, KiCAD will most likely complain about missing library "doragasu". Despite this warning, the schematic should load nicely (using the cached libraries). To avoid this message, install the missing library and make sure to configure it in the schematic editor.