Updated docs/scripts

  * mics.org: added to Org document code and documentation for small
    improvement of 'show-tip', 'duplicity-uc.sh' and
    'get-adblock-lists.sh' scripts;
  * TOP/bin/: show-tip, duplicity-uc.sh, get-adblock-lists.sh: now they
    are tangled from Org document;
  * added new files (rc and config for above scripts):
    - rc: backup-x.list, get-adbl.uri, get-adblrc