added dmag_magic, hysteresis_magic functions to ipmag
added dmag_magic, hysteresis_magic functions to ipmag

Caoimhinmg/PmagPy,lfairchild/PmagPy,Caoimhinmg/PmagPy,lfairchild/PmagPy,Caoimhinmg/PmagPy,lfairchild/PmagPy