Mappings of CSS properties, keywords and colors to various languages!

It's silly!

• Copy data/base.json to data/XX.json, where XX should preferably be an IETF language tag, but because this is silly, I won't mind pirate.json or fi-turku.json, for instance.
• Translate the things!
• Make a pull request!

The base data is from mdn/data. Use make (or node scripts/generate-base.js) to generate new base data.

TODO: Updating translations when the base data is updated.

• data/sv.json has been seeded from @johnie's repos (j1, j2), licensed under the MIT license. Tack!