Add export for ol.proj.METERS_PER_UNIT
Improve use of View2D in ol.control.ZoomToExtent
Factor out common variable in ol.dom.Input
Improve type checking in ol.events.condition.targetNotEditable
Improve type checking in ol.format.Polyline.decodeDeltas
Improve type checking in ol.geom.Circle#setCenterAndRadius
Don't attempt to use Uint8Array in ol.geom.simplify.douglasPeucker
Fix option property in ol.interaction.KeyboardPan
Improve type checking in ol.interaction.Select
Improve type checking in ol.Map
Use ol.ENABLE_* to help Compiler eliminate unreachable code
Improve type checking in ol.Object#bindTo
Sort layer types alphabetically
Add ol.ENABLE_IMAGE to control inclusion of image layer renderers
Add ol.ENABLE_TILE to control inclusion of tile layer renderers
Add ol.ENABLE_VECTOR to control inclusion of vector layer renderers
Merge pull request #1621 from twpayne/clean-ups

Miscellaneous clean-ups
Merge pull request #1617 from bartvde/issue-1617

consider exporting ol.METERS_PER_UNIT
Factor out ol.geom.Circle#getRadiusSquared_
Use getRadiusSquared_ in ol.geom.Circle#containsXY