Update README.md (#24365)

1. Add `alt=""` for the Bootstrap logo
2. Replace the HTML entities with the unicode symbols
3. Refactor the badges to something that makes more sense to me
4. Change `Selenium Test Status` alt attribute to `Sauce Labs Test Status`
5. Use shields.io for the peerDependencies badge too
6. Add CSS and JS gzip size badges, shoutout to @ngryman
7. Add a few more trailing slashes to URLs
8. Change link to tooling setup to the website one

1 files changed, 13 insertions, 15 deletions

diff --git a/README.md b/README.md
index 56231f7b5..d1b52608e 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 <p align="center">
   <a href="https://getbootstrap.com/">
-    <img src="https://getbootstrap.com/assets/brand/bootstrap-solid.svg" width=72 height=72>
+    <img src="https://getbootstrap.com/assets/brand/bootstrap-solid.svg" alt="" width=72 height=72>
   </a>
 
   <h3 align="center">Bootstrap</h3>
@@ -8,13 +8,13 @@
   <p align="center">
     Sleek, intuitive, and powerful front-end framework for faster and easier web development.
     <br>
-    <a href="https://getbootstrap.com/docs/4.0/"><strong>Explore Bootstrap docs &raquo;</strong></a>
+    <a href="https://getbootstrap.com/docs/4.0/"><strong>Explore Bootstrap docs »</strong></a>
     <br>
     <br>
     <a href="https://themes.getbootstrap.com/">Bootstrap Themes</a>
-    &middot;
+    ·
     <a href="https://jobs.getbootstrap.com/">Job Board</a>
-    &middot;
+    ·
     <a href="https://blog.getbootstrap.com/">Blog</a>
   </p>
 </p>
@@ -50,16 +50,18 @@ Read the [Getting started page](https://getbootstrap.com/getting-started/) for i
 ## Status
 
 [![Slack](https://bootstrap-slack.herokuapp.com/badge.svg)](https://bootstrap-slack.herokuapp.com/)
+[![Build Status](https://img.shields.io/travis/twbs/bootstrap/v4-dev.svg)](https://travis-ci.org/twbs/bootstrap)
 [![npm version](https://img.shields.io/npm/v/bootstrap.svg)](https://www.npmjs.com/package/bootstrap)
 [![Gem version](https://img.shields.io/gem/v/bootstrap.svg)](https://rubygems.org/gems/bootstrap)
-[![Build Status](https://img.shields.io/travis/twbs/bootstrap/v4-dev.svg)](https://travis-ci.org/twbs/bootstrap)
-[![peerDependencies Status](https://david-dm.org/twbs/bootstrap/peer-status.svg)](https://david-dm.org/twbs/bootstrap?type=peer)
-[![devDependency Status](https://img.shields.io/david/dev/twbs/bootstrap.svg)](https://david-dm.org/twbs/bootstrap?type=dev)
 [![Meteor Atmosphere](https://img.shields.io/badge/meteor-twbs%3Abootstrap-blue.svg)](https://atmospherejs.com/twbs/bootstrap)
 [![Packagist Prerelease](https://img.shields.io/packagist/vpre/twbs/bootstrap.svg)](https://packagist.org/packages/twbs/bootstrap)
 [![NuGet](https://img.shields.io/nuget/vpre/bootstrap.svg)](https://www.nuget.org/packages/bootstrap/absoluteLatest)
+[![peerDependencies Status](https://img.shields.io/david/peer/twbs/bootstrap.svg)](https://david-dm.org/twbs/bootstrap?type=peer)
+[![devDependency Status](https://img.shields.io/david/dev/twbs/bootstrap.svg)](https://david-dm.org/twbs/bootstrap?type=dev)
+[![CSS gzip size](http://img.badgesize.io/twbs/bootstrap/v4-dev/dist/css/bootstrap.min.css?compression=gzip&label=CSS+gzip+size)](https://github.com/twbs/bootstrap/tree/v4-dev/dist/css/bootstrap.min.css)
+[![JS gzip size](http://img.badgesize.io/twbs/bootstrap/v4-dev/dist/js/bootstrap.min.js?compression=gzip&label=JS+gzip+size)](https://github.com/twbs/bootstrap/tree/v4-dev/dist/js/bootstrap.min.js)
 
-[![Selenium Test Status](https://saucelabs.com/browser-matrix/bootstrap.svg)](https://saucelabs.com/u/bootstrap)
+[![Sauce Labs Test Status](https://saucelabs.com/browser-matrix/bootstrap.svg)](https://saucelabs.com/u/bootstrap)
 
 ## What's included
 
@@ -95,13 +97,13 @@ Have a bug or a feature request? Please first read the [issue guidelines](https:
 
 ## Documentation
 
-Bootstrap's documentation, included in this repo in the root directory, is built with [Jekyll](https://jekyllrb.com) and publicly hosted on GitHub Pages at <https://getbootstrap.com>. The docs may also be run locally.
+Bootstrap's documentation, included in this repo in the root directory, is built with [Jekyll](https://jekyllrb.com/) and publicly hosted on GitHub Pages at <https://getbootstrap.com/>. The docs may also be run locally.
 
 Documentation search is powered by [Algolia's DocSearch](https://community.algolia.com/docsearch/). Working on our search? Be sure to set `debug: true` in the `_scripts.html` include.
 
 ### Running documentation locally
 
-1. Run through the [tooling setup](https://github.com/twbs/bootstrap/blob/v4-dev/docs/4.0/getting-started/build-tools.md#tooling-setup) to install Jekyll (the site builder) and other Ruby dependencies with `bundle install`.
+1. Run through the [tooling setup](https://getbootstrap.com/docs/4.0/getting-started/build-tools/#tooling-setup) to install Jekyll (the site builder) and other Ruby dependencies with `bundle install`.
 2. Run `npm install` to install Node.js dependencies.
 3. Run `npm run test` (or a specific NPM script) to rebuild distributed CSS and JavaScript files, as well as our docs assets.
 4. From the root `/bootstrap` directory, run `npm run docs-serve` in the command line.
@@ -117,15 +119,13 @@ Learn more about using Jekyll by reading its [documentation](https://jekyllrb.co
 [Previous releases](https://github.com/twbs/bootstrap/releases) and their documentation are also available for download.
 
 
-
 ## Contributing
 
 Please read through our [contributing guidelines](https://github.com/twbs/bootstrap/blob/master/CONTRIBUTING.md). Included are directions for opening issues, coding standards, and notes on development.
 
 Moreover, if your pull request contains JavaScript patches or features, you must include [relevant unit tests](https://github.com/twbs/bootstrap/tree/master/js/tests). All HTML and CSS should conform to the [Code Guide](https://github.com/mdo/code-guide), maintained by [Mark Otto](https://github.com/mdo).
 
-Editor preferences are available in the [editor config](https://github.com/twbs/bootstrap/blob/master/.editorconfig) for easy use in common text editors. Read more and download plugins at <http://editorconfig.org>.
-
+Editor preferences are available in the [editor config](https://github.com/twbs/bootstrap/blob/master/.editorconfig) for easy use in common text editors. Read more and download plugins at <http://editorconfig.org/>.
 
 
 ## Community
@@ -140,7 +140,6 @@ Get updates on Bootstrap's development and chat with the project maintainers and
 - Developers should use the keyword `bootstrap` on packages which modify or add to the functionality of Bootstrap when distributing through [npm](https://www.npmjs.com/browse/keyword/bootstrap) or similar delivery mechanisms for maximum discoverability.
 
 
-
 ## Versioning
 
 For transparency into our release cycle and in striving to maintain backward compatibility, Bootstrap is maintained under [the Semantic Versioning guidelines](http://semver.org/). Sometimes we screw up, but we'll adhere to those rules whenever possible.
@@ -161,7 +160,6 @@ See [the Releases section of our GitHub project](https://github.com/twbs/bootstr
 - <https://github.com/fat>
 
 
-
 ## Copyright and license
 
 Code and documentation copyright 2011-2017 the [Bootstrap Authors](https://github.com/twbs/bootstrap/graphs/contributors) and [Twitter, Inc.](https://twitter.com) Code released under the [MIT License](https://github.com/twbs/bootstrap/blob/master/LICENSE). Docs released under [Creative Commons](https://github.com/twbs/bootstrap/blob/master/docs/LICENSE).