message: docs: update README to mention that hubot is now a JS project
diff: @@ -35,8 +35,8 @@ that is re-run daily.
  Project | Lines of CoffeeScript | Conversion status | Test status
  -------------------------------------------------------- |:---------------------:|:---------------------------------:|:---------------------------:
  [chroma.js] | 3.3K | ![chromajs-conversion-status] | ![chromajs-test-status]
  -[hubot] | 3.7K | ![hubot-conversion-status] | ![hubot-test-status]
  -[autoprefixer][autoprefixer] [\[1\]](#autoprefixer-note) | 4.8K | ![autoprefixer-conversion-status] | ![autoprefixer-test-status]
  +[hubot][hubot] [\[1\]](#converted-note) | 3.7K | ![hubot-conversion-status] | ![hubot-test-status]
  +[autoprefixer][autoprefixer] [\[1\]](#converted-note) | 4.8K | ![autoprefixer-conversion-status] | ![autoprefixer-test-status]
  [coffeelint] | 8.8K | ![coffeelint-conversion-status] | ![coffeelint-test-status]
  [vimium] | 11K | ![vimium-conversion-status] | ![vimium-test-status]
  [coffeescript][coffeescript] [\[2\]](#coffeescript-note) | 17K | ![coffeescript-conversion-status] | ![coffeescript-test-status]
  @@ -47,8 +47,9 @@ Project | Lines of CoffeeScript
  **Project builder status:** [![Build Status](https://travis-ci.org/decaffeinate/decaffeinate-example-builder.svg?branch=master)](https://travis-ci.org/decaffeinate/decaffeinate-example-builder)
  **Notes:**
  -1. <a id='autoprefixer-note'></a>autoprefixer has fully moved to JavaScript via
  - decaffeinate. This build runs on the last commit before the switch to JS.
  +1. <a id='converted-note'></a>Hubot and Autoprefixer have fully moved to
  + JavaScript using decaffeinate. This build runs on the last commit before the
  + switch to JS.
  2. <a id='coffeescript-note'></a>Some CoffeeScript tests are disabled because
  they are difficult to fix and test cases that do not seem to come up in
  real-world code. See
  