Conflate ol.format.GPX.V1_1 and ol.format.GXP into ol.format.GXP
Start earlier to log points for kinetic
Ensure that the first point for kinetic is valid
Merge pull request #2405 from tsauerwein/kinetic-fast

Improve kinetic effect when panning fast
Document debugtilesource
Merge pull request #2415 from probins/debugtile

Document debugtilesource
Merge pull request #2403 from bartvde/gpx-write

ol.format.GPX writeFeatures is not working
Add option to process GPX extensions nodes

Fixes #1791.
Add tests for GPX extensions