Dependency updates, better HJSON format

• Use more compact HJSON formatting (opening braces on the same line)
• All upstream libs are updated
• Publishing multiple Kibana version targets - 5.5.0 and 5.5.1

help link, compact hjson, error/warning styling

• show a help link to point to this github repo's readme
• support of the new HJSON compact formatting
• error and warning links in colors

Initial release

Initial release, supporting Vega (v3.0.0-rc3), VegaLite (v2.0.0-beta.6), and Vega on top of a Leaflet map.