Merge libgmxana into libgromacs.
- Move contents of src/tools/ into src/gromacs/gmxana/, except for
g_tune_pme.c and g_pme_error.c.
- Delete unused src/tools/g_membed.c.
- Adjust the build system accordingly, removing references to gmxana.
- Merge contents of libgmxana.pc into libgromacs.pc and remove the
former.
- Move src/gromacs/legacyheaders/gmx_ana.h into src/gromacs/gmxana/ and
adjust files that include it accordingly. Removed a few unnecessary
inclusions of this header. Don't install it, as it doesn't do much
good.
- Merge src/contrib/g_sdf.c into src/contrib/gmx_sdf.c to make it
independent of gmx_ana.h. Remove gmx_sdf() from gmx_ana.h.
Closes #1013.
Change-Id: I34ba52fc938823833103123c8ada06d169abf7de