Update render_doIdentityTMarkersCommons.sh:
    
        - The source location on which sed replacements take place is
          variable now. By default we use the value of INSTANCE variable,
          but if "$1" variable is not empty assume "$1" as source location
          on which sed replacements take place. This makes possible to
          reuse this function on different source locations.
    
        - Start using cli_getPathComponent function instead of
          cli_getThemeName.