v.0.0.5 (2015_09_17) :
o added --targetkill/-tk option and the action__targetkill() function
o improved show_infos_about_target_path() : each column has its own separator,
the table is computed by the function : no more magic numbers
o added -ti, --targetinfos option (--targetinfos/-ti uses --quiet mode)
o added --settag, --to options
o fixed get_disk_free_space() for Windows systems
o added short options for some options : -c, -s, -ti, -m, -q
o 'shortened_str' > 'shortstr'
o added a 'tag' field in the database