[openstreetmap/openstreetmap-website] Put link to https://wiki.openstreetmap.org/wiki/Standard_tile_layer/Key (#1321)

[Wuzzy]

(This is a spin-off issue of #1307.)

## Suggestion
I suggest to put a link to https://wiki.openstreetmap.org/wiki/Standard_tile_layer/Key on the key sidebar. I suggest to put the link to the bottom. 

## Rationale
The idea is that the user can then see the more “complete” key here. Since Standard has very many symbols, putting them on an external page might help.

## Explanation
This wiki page contains most, if not all symbols, many lines and area colors and is very detailed already. It is not 100% complete nor perfect and maybe it never will (because of the complexity of Standard). Of course, it will also be doomed to become outdated over time. But the same problem applies with the “official” key as well. I'm also not saying that the “wiki solution” should be permanent (if a better solutions pops up in the future), but I suppose it is a very good start and partially solves the problem that the current “official” key is VERY incomplete.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/issues/1321
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/rails-dev/attachments/20161012/460ae7c0/attachment-0001.html>