made a const_cast in mpi_collective to prevent compiler errors
adapted file Makefile
Merge branch 'develop' of pc40-c722.uibk.ac.at:Projekte/feltor into develop
some Makefile adaptions
Merge branch 'develop' of pc40-c722.uibk.ac.at:Projekte/feltor into develop
little bug in geometry.h
fixed bug in dz, created mpi guards in couts in multistep and cg
Merge branch 'develop' of pc40-c722.uibk.ac.at:Projekte/feltor into develop
created ghostless_grid function for mpi use in interpolation function
Merge branch 'develop' of pc40-c722.uibk.ac.at:Projekte/feltor into develop
debugged feltor_hpc.cpp
clean up mpi_collective.h