docs: optimise PNGs
I used zopflipng with 100 iterations on most of them, and advpng with 300 iterations in zopfli mode on front_page_screenshot.png
Before Width: | Height: | Size: 14 KiB After Width: | Height: | Size: 13 KiB |
Before Width: | Height: | Size: 1.8 KiB After Width: | Height: | Size: 1.2 KiB |
Before Width: | Height: | Size: 1.1 KiB After Width: | Height: | Size: 942 B |
Before Width: | Height: | Size: 5.0 KiB After Width: | Height: | Size: 4.8 KiB |
Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 17 KiB |
Before Width: | Height: | Size: 6.1 KiB After Width: | Height: | Size: 5.9 KiB |
Before Width: | Height: | Size: 6.9 KiB After Width: | Height: | Size: 6.7 KiB |
Before Width: | Height: | Size: 15 KiB After Width: | Height: | Size: 14 KiB |
Before Width: | Height: | Size: 19 KiB After Width: | Height: | Size: 18 KiB |
Before Width: | Height: | Size: 11 KiB After Width: | Height: | Size: 11 KiB |
Before Width: | Height: | Size: 7.6 KiB After Width: | Height: | Size: 7.2 KiB |
Before Width: | Height: | Size: 5.4 KiB After Width: | Height: | Size: 5.1 KiB |
Before Width: | Height: | Size: 9.2 KiB After Width: | Height: | Size: 8.9 KiB |
Before Width: | Height: | Size: 83 KiB After Width: | Height: | Size: 59 KiB |
Before Width: | Height: | Size: 33 KiB After Width: | Height: | Size: 17 KiB |
Before Width: | Height: | Size: 34 KiB After Width: | Height: | Size: 25 KiB |
Before Width: | Height: | Size: 22 KiB After Width: | Height: | Size: 8.9 KiB |
Before Width: | Height: | Size: 854 B After Width: | Height: | Size: 693 B |
Before Width: | Height: | Size: 31 KiB After Width: | Height: | Size: 30 KiB |
Before Width: | Height: | Size: 9.7 KiB After Width: | Height: | Size: 9.4 KiB |
Before Width: | Height: | Size: 64 KiB After Width: | Height: | Size: 62 KiB |
Before Width: | Height: | Size: 78 KiB After Width: | Height: | Size: 78 KiB |
Before Width: | Height: | Size: 146 KiB After Width: | Height: | Size: 144 KiB |
Before Width: | Height: | Size: 17 KiB After Width: | Height: | Size: 16 KiB |
Before Width: | Height: | Size: 37 KiB After Width: | Height: | Size: 36 KiB |
Before Width: | Height: | Size: 19 KiB After Width: | Height: | Size: 11 KiB |
Before Width: | Height: | Size: 17 KiB After Width: | Height: | Size: 16 KiB |
Before Width: | Height: | Size: 186 KiB After Width: | Height: | Size: 38 KiB |
Before Width: | Height: | Size: 49 KiB After Width: | Height: | Size: 47 KiB |
Before Width: | Height: | Size: 66 KiB After Width: | Height: | Size: 44 KiB |
Before Width: | Height: | Size: 528 KiB After Width: | Height: | Size: 526 KiB |
Before Width: | Height: | Size: 6.4 KiB After Width: | Height: | Size: 3.4 KiB |
Before Width: | Height: | Size: 5.6 KiB After Width: | Height: | Size: 3.0 KiB |
Before Width: | Height: | Size: 38 KiB After Width: | Height: | Size: 33 KiB |
Before Width: | Height: | Size: 7.5 KiB After Width: | Height: | Size: 5.0 KiB |
Before Width: | Height: | Size: 25 KiB After Width: | Height: | Size: 13 KiB |
Before Width: | Height: | Size: 45 KiB After Width: | Height: | Size: 27 KiB |
Before Width: | Height: | Size: 72 KiB After Width: | Height: | Size: 43 KiB |
Before Width: | Height: | Size: 4.1 KiB After Width: | Height: | Size: 3.3 KiB |
Before Width: | Height: | Size: 4.1 KiB After Width: | Height: | Size: 3.2 KiB |
Before Width: | Height: | Size: 9.9 KiB After Width: | Height: | Size: 8.9 KiB |
Before Width: | Height: | Size: 24 KiB After Width: | Height: | Size: 14 KiB |
Before Width: | Height: | Size: 22 KiB After Width: | Height: | Size: 14 KiB |