Merge pull request #243 from komatits/devel

changed pgf90 back to pgfortran, since the problem detected by BuildBot was not coming from that
adds convert_model_file_adios.f90 to src/tomography/; updates make files
adds model interpolation tool to src/tomography
adds tomography tools for summation,smoothing and model updates
updates Makefile.in to add model update executables to  make help informations
added missing headers