Add fire-station icon for fire-hydrant

[bagage]

Fire hydrants are for firemen anyway, and it help distinguish them from other no-icon point on the map.

By the way, is there any plan to upgrade maki from version 0.5.0 to latest version 2.0.x? Is that OK if I migrate iD by updating icons' name or there is a particular reason to use maki 0.5.0?

[bhousel]

By the way, is there any plan to upgrade maki from version 0.5.0 to latest version 2.0.x? Is that OK if I migrate iD by updating icons' name or there is a particular reason to use maki 0.5.0?

I'd like to upgrade to maki2, but there's a bit of work for us to be able do this. see #3024, #3025
Because it uses different icon sizes, it's not a drop in replacement. We have a bunch of places in the iD code that pick the right icon and construct a name with the right size (e.g. it turns fire-station into fire-station-12, fire-station-18, or fire-station-24).

[bagage]

Ooooh, it looks like a considerable work actually! I subscribed to these issues to keep track of any progress here (and for any get-started label if any!). Thanks @bhousel.