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 |