Remove AdResS

Remove AdResS

This feature will disappear with the group scheme, so we might as well
get it out of the way first. Doing this removal on its own might help
re-implement some time, if someone was keen.

Removed bVir, bPress, bSurft fields of t_mdebin, because all MD
algorithms now support such calculations.

gmx grompp now issues a fatal error if the main adress .mdp option is
on, and otherwise ignores the obsolete fields (like we do with other
.mdp options we've removed).

mdrun can read old .tpr files, but issues a fatal error if AdResS was
active in them.

gmx dump and gmx compare ignore all AdResS related fields.

Other tools can still read such .tpr files for their other content.

Removed Sebastian Fritsch from GROMACS 2016 contributor list, since he
only worked on AdResS features. Christoph Junghans made other
contributions that are still useful, and so remains.

Removed obsolete literature references

Also fixed some incorrect doxygen of init_forcerec().

Part of #1852

Change-Id: I22fa0fe480148aeda0ace194646a5ec2f3d20a8c