added flux.h flux_t.cu and orthogonal_t.cu
added flux.h flux_t.cu and orthogonal_t.cu

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