Updated NZBGet to 9.1

nzbget-9.1:
  - added full par-scan feature needed to par-check/repair files which
    were renamed after creation of par-files:
        - new option <ParScan> to activate full par-scan (always or
          automatic);
        - the automatic full par-scan activates if missing files are
          detected
          during par-check, this avoids unnecessary full scan for normal
          (not renamed) par sets;
  - replaced a browser error message when trying to add local files
    in IE9 with a better message dialog;
  - improved the post-processing script to better handle renamed
    rar-files.