want to add the feature "loadImage"

[codingmiao]

When I want to add a Symbol layer, but the icon I need is not in the Sprite, I often use function "loadImage" to add it, which is more convenient than modifying the Sprite:

    const icon = {
        url: 'http://xxx.com/test.png',
        id: 'myicon'
    }
    //load icon
    map.loadImage(icon.url, function (error, image) {
        map.addImage(icon.id, image);
    })
    //....
    //add layer to map
    const layer = {
        "id": 'marklayer_' + icon.id,
        "type": "symbol",
        "source": "sourceName",
        "source-layer": "sourceLayerName",
        "layout": {
            "icon-allow-overlap": true,
            "icon-image": icon.id,
        }
    }
    map.addLayer(layer)

But there's no way to "loadImage" in Maputnik，I am keen to add this feature，thanks~

[orangemug]

Hi @codingmiao, we have discussed this, and have some ideas to add this. We'll update this ticket when we make some progress.

If you have the time please also tell us what you use Maputnik for over in #164