The doc/sigtest.pdf link in the ReadMe is not working because the sigtest.pdf is not in the doc directory. The sigtest.pdf is in doc/UG/sigtest.pdf.
Also the location of doc/sigtest.pdf should be doc/UG/sigtest.pdf in the Componenet Descriptions and Locations section in the ReadMe.
Also the location of doc/sigtest.pdf should be doc/UG/sigtest.pdf in the Componenet Descriptions and Locations section in the ReadMe.