merge leo3 spectral Makefile
merge leo3 spectral Makefile

mwiesenberger/feltor,e3reiter/feltor,e3reiter/feltor,e3reiter/feltor,rkube/feltor,feltor-dev/feltor,feltor-dev/feltor,feltor-dev/feltor,rkube/feltor,rkube/feltor,mwiesenberger/feltor,rkube/feltor,mwiesenberger/feltor,e3reiter/feltor,rkube/feltor,mwiesenberger/feltor,e3reiter/feltor,feltor-dev/feltor