Name of utilities

[mglisse]

The utilities in gudhi were given names that are fine as long as they stay somewhere isolated, but they are not so nice if you intend to install them in a standard location (say /usr/local/bin) on your system. Debian ends up manually renaming each of them:
Nerve -> gudhi-nerve
VoronoiGIC -> gudhi-voronoi-gic
alpha_complex_persistence -> gudhi-alpha-complex-persistence
GudhUI -> gudhui

While capitalization and - vs _ may be a matter of taste, being able to add a prefix gudhi- for all utilities (except maybe gudhui which is already close enough?) looks useful, both to help discover all the other utilities, and to avoid conflicts. #920 adds a utility ripser, which is likely to conflict with other packages in conda/pip/debian/etc.
CMake does not seem to have the equivalent of autoconf's --program-prefix=PREFIX or --program-transform-name=PROGRAM, but something along these lines would make sense to me.