Add examples to ol.coordinate functions.
Merge pull request #2425 from marcjansen/examples

Add examples to ol.coordinate functions
Revert "Add FIXME"

This reverts commit a4afcd533fce7d577a9aae75bf8351e87009b126.

Code removed in 7fabff5ffac497ea8a8245a22af446c66c19531f
Merge pull request #2427 from fredj/misc

Revert "Add FIXME"
Rename ol3Logo to logo in map options
Reuse event pixel to compute the coordinate
Merge pull request #2429 from fredj/reuse-pixel-for-coord

Reuse event pixel to compute the coordinate
Update introduction tutorial
Allow string & object to be passed as map logo
Uncollapse when there’s only logos
Fixes wording in comments
Set type=button to avoid forms submit
Add link support for source logos
Wording in docs
More complete doc for `logo` option
Type check with `olx.LogoOptions`
Merge pull request #2431 from probins/intro

Update introduction tutorial
Merge pull request #2413 from tonio/logos

Revisit Logos
Add a worldExtent to ol.proj.Projection
Add ol.geom.flat.geodesic

Inspired by #1884 by @twpayne.