Make interaction "active" an ol.Object property
Treat unknown opt types as Object in ol externs
Rename updatefeature event to changefeature
Merge pull request #2765 from elemoine/ol-externs

Treat unknown opt types as Object in ol externs
Merge pull request #2766 from elemoine/interaction-object

Make interaction "active" an ol.Object property
Merge pull request #2772 from fredj/changefeature

Rename updatefeature event to changefeature
Export constructors of ol.source.Source children

Necessary addition to https://github.com/openlayers/ol3/pull/2749.
Merge pull request #2751 from gberaudo/export-source_source_children

Export constructors and options of ol.source.Source children
More restrictive type for ol.style.Circle#getImage
More restrictive type for ol.style.Icon#getImage
Mark ol.style.Image with @api

This is to be able to do `imageStyle instanceof ol.style.Image` in applications.
Mark ol.style.Image#getImage with @api
Merge pull request #2773 from elemoine/getimage

Type-related changes to ol.style.Image
Clear the canvas on layer extent changes