--  Change references to DelftOnline in all Makefile.am files
    from absolute path on devux32 to path to third_party_open.

--  What to do with resolve_path in hydra.cpp?

--  Deal with version numbering.
    Generate (?) engines_gpl/flow2d3d/packages/flow2d3d/src/flow2d3d_version.f90
    Preferable convert to C and store version strings in GDP