while here collect the links at the end.

see github issue #9

Point out that *by default* telescope uses XDG-style directories, but if ~/.telescope exists XDG is ignored. While here also use a shorter URL for the XDG spec and add it to the STANDARDS section of the manpage.

Use XDG-compliant paths unless ~/.telescope already exists. Provide a script to migrate to XDG-style directory for users who wish to do so.