ddr-public favicons

IIRC the various sizes of favicon all have to get packed into the single
`favicon.ico` file for it to work correctly at various resolutions.

favicon-16.png 
favicon-24.png 
favicon-32.png 
favicon-48.png 
favicon-57.png 
favicon-64.png 
favicon-72.png 
favicon-96.png
favicon-128.png 
favicon-195.png 
favicon-512.png 

convert favicon-ddr-16.png favicon-ddr-24.png favicon-ddr-32.png favicon-ddr-48.png favicon-ddr-57.png favicon-ddr-64.png favicon-ddr-72.png favicon-ddr-96.png favicon-ddr-128.png favicon-ddr-195.png favicon.ico

<link rel="shortcut icon" sizes="16x16 24x24 32x32 48x48 64x64" href="/static/favicon.ico">
