closure/compiler.jar
  The closure compiler, v20180402, by Google.
  Apache v2.0 license.
  https://github.com/google/closure-compiler

closure/goog
  The closure library (modified), possibly v20150315, by Google.
  Apache v2.0 license.
  https://github.com/google/closure-library
  Local mods:
    - Library stripped down to just dependency management & URI parsing

closure/deps
  The closure dependency generator, part of the closure library, by Google.
  Apache v2.0 license.
  https://github.com/google/closure-library