Do not use getView2D in the examples
Add calculateCenterZoom|Rotation to ol.View2D
Add constrainResolution|Rotation to ol.View2D
Add ol.TileCoord.createOrUpdate
Enable ol.TileCoord re-use
Re-use ol.TileCoord objects
Add ol.TileRange.createOrUpdate
Enable ol.TileRange re-use
Re-use ol.TileRange objects
Add ol.Extent.createOrUpdate
Enable ol.Extent re-use
Re-use ol.Extent objects
Eliminate an ol.TileCoord allocation
Merge pull request #516 from elemoine/no-getview2d-in-examples

Do not use getView2D in the examples
Merge pull request #519 from twpayne/tile-garbage-clean-ups

Tile garbage clean-ups
Increase default tile cache size
Merge pull request #438 from twpayne/boost-tile-limits

Tile limits are too low
Only document the exported API, not every symbol

There is more work to be done, because this filters out more
than desired, and we don't have events documented yet.
Nicer way to fix @inheritDoc
Move pan function from View2D to Interaction