Add ol.style.Circle
Make ol.style.Image a base class for Icon and Circle
Remove ol.icon.renderIcon
Remove ol.shape.renderCircle
Add olx.style.CircleOptions
Add olx.style.IconOptions
Remove olx.style.ImageOptions
Canvas replay uses ol.style.Image#getImage
Canvas immediate uses ol.style.Image#getImage
Example icon uses ol.style.Icon
Example dynamic-data uses ol.style.Circle
Example geojson uses ol.style.Circle
Example igc uses ol.style.Circle
Example synthetic-points uses ol.style.Circle
Example rtree uses ol.style.Circle
Export ol.style.Icon
Export ol.style.Circle