add CONTRIBUTORS file
add CONTRIBUTORS file


Primosbookkeeping/gxp,xenomachina/gxp,Primosbookkeeping/gxp,xenomachina/gxp,xenomachina/gxp,Primosbookkeeping/gxp,xenomachina/gxp,Primosbookkeeping/gxp,Primosbookkeeping/gxp