- MOD: By default, use symlinks instead of hardlinks to keep files in
       synch. Hardlinks or file copies may nonetheless be used thanks
       to the '--hard' or '--copy' options.
       Symlinks make it more obvious when files are being tracked with
       GCFG; some programs unfortunately choke on them (eg: sudo).
       Hardlinks may advantageously replace symlinks, though some
       programs choke on them too (eg: cron).
       File copy can be used as a last resort (de-synchronization being
       detected when using 'gcfg verify').
- MOD: Going back to hardlinks by default (which give far less troubles than
       symlinks, e.g. with AppArmor). If hardlinking fails, file will be
       copied instead. 'gcfg verify' has been added to 'gcfg git ...'
       commands to make sure GIT repository is synchronized before being
       used.
- MOD: 'gcfg pkglist' does not out put the updated packages listing
       anylonger.
- FIX: Cron file hard-linked instead of sym-linked at creation
- MOD: Allow to configure GCFG without user name and e-mail address
       (use system defaults)
- FIX: Handle hardlinks failure more gracefully
- NEW VERSION (0.9.20130314)