deckgl samples

[anglarett]

deckgl samples: heatmap, polygon, kml, kml-updated.

[snippet-bot]

Here is the summary of changes.

You are about to add 4 region tags.

• samples/deckgl-heatmap/style.css:6, tag maps_add_map
• samples/deckgl-kml-updated/style.css:6, tag maps_add_map
• samples/deckgl-kml/style.css:6, tag maps_add_map
• samples/deckgl-polygon/style.css:6, tag maps_add_map

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