Hit detect circle points with no fill
Trigger a render in ol.Control#setMap

Closes #1525
Merge pull request #1599 from fredj/1525

Trigger a render when a control is added to the map
Merge pull request #1595 from elemoine/icon-hit-detection

Hit detect circle points with no fill
allow target to be specified as a string for controls, update the documentation to make more clear what element and target are for
simplify the assignment of this.target_
remove question mark since all object properties are nullable by default
Merge pull request #1220 from bartvde/control-target

shouldn't we allow to pass in target as string as well for controls? (r=@elemoine,@ahocevar)
Add olx.* namespaces for jsdoc
Merge pull request #1604 from twpayne/olx-in-api-docs

Add olx.* namespaces for jsdoc
Lets ol.style.Icon to define default values