created generic_magic native 3.0 conversion script as per #135
created generic_magic native 3.0 conversion script as per #135

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