applied utiles/wesnoth-optipng on images/

Overall statistics (only for files with a smaller recompressed size):
  Original size: 423 KiB on 192 files
 Optimized size: 216 KiB
   Total saving: 207 KiB = 48% decrease
applied utiles/wesnoth-optipng on data/

Overall statistics (only for files with a smaller recompressed size):
  Original size: 276 KiB on 14 files
 Optimized size: 226 KiB
   Total saving: 50 KiB = 18% decrease