Add glossary to documentation.
Add glossary to documentation.

ultimate-pa/benchexec,michkot/benchexec,martin-neuhaeusser/benchexec,sosy-lab/benchexec,ultimate-pa/benchexec,IljaZakharov/benchexec,cheshire/benchexec,cheshire/benchexec,ultimate-pa/benchexec,IljaZakharov/benchexec,dbeyer/benchexec,bjowac/impara-benchexec,sosy-lab/benchexec,sosy-lab/benchexec,martin-neuhaeusser/benchexec,martin-neuhaeusser/benchexec,dbeyer/benchexec,dbeyer/benchexec,martin-neuhaeusser/benchexec,sosy-lab/benchexec,michkot/benchexec,michkot/benchexec,bjowac/impara-benchexec,dbeyer/benchexec,ultimate-pa/benchexec,cheshire/benchexec,ultimate-pa/benchexec,bjowac/impara-benchexec,sosy-lab/benchexec,IljaZakharov/benchexec,ultimate-pa/benchexec,IljaZakharov/benchexec,sosy-lab/benchexec