changed definition of h, now consistent with literature.

examples/SedovBlast/makeIC.py

examples/SedovBlast/rdf.py

examples/SedovBlast/solution.py

examples/SodShock/rhox.py

examples/test.c

examples/test_single.c

src/const.h

src/engine.c

src/kernel.h

src/runner.c

src/runner_doiact.h

src/runner_iact.h

src/space.c

src/space.h