fix change of ownership of restored files
update date in COPYRIGHT
restore: tablespace relocation, dry run, summary

- Add the -t name:dir switch to relocate tablespaces on restore. The
  user can give the option multiple times if more than one tablespace
  has to be relocated. At the end of the restore, a SQL file is created
  to update the catalog of versions <= 9.1
- Improve the output of restore_pitr by adding a summary of the key info
  of the restore (dirs, backup, conf)
- Add the -n switch to only display the info on the restore, e.g. dry
  run
- Fix the cleanup of the temporary directory
- Update the documentation
- Use -? instead of -h to display usage of pitr_mgr, so that -? is used
  everywhere