message: docs(readme): minor tweaks to main README
  ### Related Ticket(s)
  No related issue
  ### Description
  These are minor updates to the README. We are no longer using circle-ci so that badge has been removed, and replaced with percy.
  ### Changelog
  **Changed**
  Minor updates to the main README file
diff: <a href="https://github.com/carbon-design-system/carbon/blob/master/LICENSE">
  <img src="https://img.shields.io/badge/license-Apache--2.0-blue.svg" alt="Carbon is released under the Apache-2.0 license" />
  </a>
  - <a href="https://circleci.com/gh/carbon-design-system/ibm-dotcom-library">
  - <img src="https://circleci.com/gh/carbon-design-system/ibm-dotcom-library/tree/master.svg?style=shield" alt="Build Status" />
  - </a>
  <a href="https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/.github/CONTRIBUTING.md">
  <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs welcome" />
  </a>
  + <a href="https://percy.io/538fc19a/IBM.com-Library-React">
  + <img src="https://percy.io/static/images/percy-badge.svg" alt="This project is using Percy.io for visual regression testing." />
  +</a>
  </p>
  ## Getting started
  If you're just getting started, check out
  [`react`](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/packages/react).
  -Vanilla components and patterns are coming soon!
  +Web Components coming soon!
  If you're trying to find something specific, here's a full list of packages that
  we support!
  @@ -35,11 +35,11 @@ we support!
  | Package name | Description |
  | ------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------- |
  | [`@carbon/ibmdotcom-react`](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/packages/react) | IBM.com React components and patterns |
  +| [`@carbon/ibmdotcom-web-components`](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/packages/web-components) | IBM.com Vanilla components with a new web standard (Web Components) |
  | [`@carbon/ibmdotcom-vanilla`](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/packages/vanilla) | IBM.com Vanilla components |
  | [`@carbon/ibmdotcom-services`](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/packages/services) | IBM.com ES6 Service classes |
  | [`@carbon/ibmdotcom-styles`](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/packages/styles) | Framework agnostic styles package for IBM.com components |
  | [`@carbon/ibmdotcom-utilities`](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/packages/utilities) | IBM.com ES6 Utility classes |
  -| [`@carbon/ibmdotcom-web-components`](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/packages/web-components) | IBM.com Vanilla components with a new web standard (Web Components) |
  If you are building pages for IBM.com,
  [see what is needed on the page](https://github.com/carbon-design-system/ibm-dotcom-library/blob/master/docs/building-for-ibm-dotcom.md).
  