Wrong number of points in cavity profile output.

[Benoist LAURENT]

With option profile = true, there is always one more pore radius value than z coordinates.

Example:

$ epock -s examples/glic.pdb -c examples/config_files/pore.cfg
$ awk  '{print NF-1}' cav_profile.dat
116
117

[Benoist LAURENT]

Note that in scripts/plot_profile.py:61 the first radius value is omitted. Why is that?