Update notes/2.13.md
Merge branch 'master' of https://github.com/openlayers/openlayers
Safeguard against listeners that recreate the grid

We need to handle the backbuffer before we fire the loadend event.
Otherwise listeners that call e.g. mergeNewParams() will cause the
backbuffer removal code to fail, because tile.imgDiv (and hence
this._transitionElement) will be null.
Merge pull request #843 from ahocevar/early-loadend

Safeguard against listeners that recreate the grid. r=@bartvde
Merge remote-tracking branch 'upstream/master'
Update tests
Added tests
Fix irregular character that Ruby/Rails objects to
Simplify pull request
Merge pull request #850 from eykamp/irregular_character

Irregular character
Don't hex encode zoom level in AGSCache layer
Merge pull request #852 from mpriour/agsCacheZoom

Don't hex encode zoom level in AGSCache layer (r=@bartvde)
Make click handler propagate touchend

This commit is a follow-up on issue #294 and commit a6119f6. Our handlers should not prevent the bubbling up of browser events. This, for example, prevents Sencha Touch's longpress events from working properly.
Merge pull request #861 from elemoine/stopevent

Make click handler propagate touchend
Uncache images that are no longer valid

When a layer sets a cached image's className to something else than
.olTileImage (e.g. by setting .olTileReplacing), we should not keep the
image in the cache any more, because it may no longer be valid.
Merge pull request #863 from ahocevar/uncache

Uncache images that are no longer valid. r=@bartvde
Make 'geodesic' & 'displaySystem' API properties.

The geodesic-property is used inside of our examples, yet isn't officially
part of the public API.

The displaySystem-property provides a very useful way of configuring the
output of the measurements and should be promoted as well.
Adjust method documentation.
Remove end-of-line whitespace.
Promote several properties to public API.

The properties

  * layers
  * queryVisible
  * url
  * layerUrls
  * infoFormat
  * vendorParams
  * format
  * formatOptions

should all be visible in the public API since they are essentially very
convenient to use when customizing the control.