Update `svg_convertPngToBrands.sh':
    
        - Rename function name from `svg_convertPngToBrands' to
          `svg_convertPngToIcons'.
    
        - Change the way size-specific images are stored in the working
          copy. Now, size-specific images are organized inside
          size-specific directories. There is one directory for each size
          images are produced for.
    
        - Start using inkscape to produce the base resized PNG image
          instead of ImageMagick.