Dans build.bat, node-gyp est lancé avec --msvs_option=2013.
However, VS2013 is not downloadable, only VS2015, which is msvs_version 2015.
The build guide for windows should be updated to warn that you will need to install some specifics modules of VS2015 (Build Tools, Common Tools for C ...), and build.bat should be edited to either use the msvs_version set in npm_config, or at least to 2015.