Remove old kml example data
Move countries.geojson into geojson subdirectory
Move us.json into topojson subdirectory
Move countries.sld into sld subdirectory
Use ol.format.XSD.readString in ol.format.KML
Add ol.format.XSD.readBoolean function
Use ol.format.XSD.readBoolean in ol.format.KML
Merge pull request #1582 from fredj/kml-cleanup

Kml cleanup
Merge pull request #1584 from twpayne/clean-up-example-data

Clean up example data
Remove unneeded 'ms' param from Date.UTC function
Rename ol.format.KML.readscale_ to ol.format.KML.readScale_
Add exponent support in ol.format.XSD.readDecimal
Better ol.format.XSD.* documentation
Use ol.format.XSD.readDecimal in ol.format.KML
Merge pull request #1587 from fredj/misc

Various ol.format.XSD and ol.format.KML cleanups