Remove old kml example data
Move countries.geojson into geojson subdirectory
Move us.json into topojson subdirectory
Move countries.sld into sld subdirectory
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
Add heatmap example