Ah ha!
Found the option to add a zip library but then when it compiles I get ;
C:\Users\kgurr\Documents\Arduino\libraries\PN532-PN532_HSU/PN532_SPI.h:6:28: fatal error: PN532Interface.h: No such file or directory
#include "PN532Interface.h"
^
compilation terminated.
exit status 1
Error compiling for board Arduino/Genuino Mega or Mega 2560.
Specified folder/zip file does not contain a valid library