Import languages from Linguist

Create a script, any language, which must be checked into `/tools/` in this repo and be run in Travis CI, which creates data files for any languages that are in Linguist https://github.com/github/linguist/blob/master/lib/linguist/languages.yml but are missing from coAST.

This would replace https://github.com/coala/coala/issues/4556 .

Try to include as much information from Linguist as possible, enhancing the local schema as needed.