Add links to brand asset pages in icon meta

[psolbach]

trafficstars

Companies often have dedicated press or brand resource pages with assets in various formats, e.g. StackOverflow or Kickstarter. We could link out to these pages in API responses. But googling these ain't hard and links might break. Not really sure.

[tschoffelen]

I wouldn't do that, as they indeed might change quite frequently. Would also make the process to add new icons more time-consuming, and the API response longer.