Make ol.Object#getKeys about 10x faster
Moving squaredDistanceToSegment to the coordinate package
Merge pull request #1224 from twpayne/faster-object-getkeys

Make ol.Object#getKeys about 10x faster
Let closestOnSegment return nothing more than a coordinate

Since we do not use the 'along' property anywhere, and the
resulting array returned by closestOnSegment could cause trouble
when working with 3d coodinates, now only the closest point is
returned, and the squared distance to the segment is calculated
by squaredDistanceToSegment instead.
Function to buffer an extent
When expiring tiles, consider max symbol size

When an extent is invalidated, we have to expire tiles outside of that extent to account for symbolizer size.
Add tests
Merge pull request #1225 from ahocevar/closest-on-segment

squaredDistanceToSegment and footOfPerpendicularToSegment
Merge pull request #1226 from tschaub/dirty-buffer

Buffer dirty extent when rendering,
The code generated from objectliterals.jsdoc requires name on same line

Without this change, the `interactions` property is renamed on map options (see #1210).
Merge pull request #1227 from tschaub/interactions-option

Interactions option not respected.
Getter and setter support for bindTo
Add tests for ol.Object#bindTo getters and setters
Remove 'valueAsNumber' property from ol.dom.Input

Use bindTo.transform functions instead
Notify target object after transform functions change