[Patch] Rotating icon with MapCSS

[Aun Johnsen <lists@…>]

On some instances it would be desirable if an icon could be rotated. Either by the direction of the road (i.e. a pedestrian crossing) or completely independent

node[highway=crossing]:connected {
    icon-image:    "presets/pedestrian_crossing.png";
    icon-rotation: way;
}

this turns the icon to follow the direction of the way

node[mykey=value] {
    icon-image:   "arrow-symbol.png";
    icon-rotation: 60;
}

this rotates the icon 60 degrees clockwise.

If the syntax doesn't quite fit, feel free to improve