Fix links and formatting in README.md

Updated links in the README to use HTTPS and corrected some formatting issues.

Author: coliff

README.md

@@ -7,23 +7,7 @@
 <h4 align="center">A SublimeLinter plugin for HTML, using HTMLHint.</h4>
 
 <p align="center">
-  <a href="https://travis-ci.org/htmlhint/SublimeLinter-contrib-htmlhint">
-    <img src="https://img.shields.io/travis/htmlhint/SublimeLinter-contrib-htmlhint.svg" alt="Travis Build Status">
-  </a>
-  <a href="https://codecov.io/gh/htmlhint/SublimeLinter-contrib-htmlhint">
-    <img src="https://codecov.io/gh/htmlhint/SublimeLinter-contrib-htmlhint/branch/master/graph/badge.svg" alt="Codecov">
-  </a>
-  <a href="https://www.npmjs.com/package/SublimeLinter-contrib-htmlhint">
-    <img src="https://img.shields.io/npm/dm/SublimeLinter-contrib-htmlhint.svg" alt="NPM count">
-  </a>
-  <img src="https://badgen.net/badge/license/MIT/green" alt="MIT Licence" />
-  <a href="https://discord.gg/nJ6J9CP">
-    <img src="https://img.shields.io/badge/chat-on%20discord-7289da.svg" alt="Chat">
-  </a>
-</p>
-
-<p align="center">
-  <a href="#install">How To Use</a> • <a href="/CONTRIBUTING.md">Contributing</a>  • <a href="https://htmlhint.com">Website</a>
+  <a href="#install">How To Use</a> • <a href="/CONTRIBUTING.md">Contributing</a> • <a href="https://htmlhint.com">Website</a>
 </p>
 
 ## Table of Contents
@@ -35,7 +19,7 @@ This linter plugin for [SublimeLinter][docs] provides an interface to [HTMLHint]
 
 ## Install
 
-SublimeLinter 3 must be installed in order to use this plugin. If SublimeLinter 3 is not installed, please follow the instructions [here](http://www.sublimelinter.com/en/stable/installation.html).
+SublimeLinter 3 must be installed in order to use this plugin. If SublimeLinter 3 is not installed, please [follow the instructions](https://www.sublimelinter.com/en/stable/installation.html).
 
 ### Linter installation
 
@@ -59,7 +43,7 @@ Or install `htmlhint` locally in your project folder (**you must have package.js
 
 ### Linter configuration
 
-In order for `htmlhint` to be executed by SublimeLinter, you must ensure that its path is available to SublimeLinter. Before going any further, please read and follow the steps in [“Finding a linter executable”](http://sublimelinter.readthedocs.org/en/latest/troubleshooting.html#finding-a-linter-executable) through “Validating your PATH” in the documentation.
+In order for `htmlhint` to be executed by SublimeLinter, you must ensure that its path is available to SublimeLinter. Before going any further, please read and follow the steps in [“Finding a linter executable”](https://sublimelinter.readthedocs.io/en/latest/troubleshooting.html#finding-a-linter-executable) through “Validating your PATH” in the documentation.
 
 Once you have installed and configured `htmlhint`, you can proceed to install the SublimeLinter-contrib-htmlhint plugin if it is not yet installed.
 
@@ -77,7 +61,7 @@ To install via Package Control, do the following:
 
 For general information on how SublimeLinter works with settings, please see [Settings][settings]. For information on generic linter settings, please see [Linter Settings][linter-settings].
 
-You can configure `htmlhint` options in the way you would from the command line, with `.htmlhintrc` files. For more information, see the [htmlhintrc docs](https://github.com/yaniswang/HTMLHint/wiki/Rules). The linter plugin does this by searching for a `.htmlhintrc` file itself, just as `htmlhint` does from the command line. You may provide a custom config file by setting the linter’s `"args"` setting to `["--config", "/path/to/file"]`. On Windows, be sure to double the backslashes in the path, for example `["--config", "C:\\Users\\Username\\htmlhint.conf"]`.
+You can configure `htmlhint` options in the way you would from the command line, with `.htmlhintrc` files. For more information, see the [htmlhintrc docs](https://htmlhint.com/rules/). The linter plugin does this by searching for a `.htmlhintrc` file itself, just as `htmlhint` does from the command line. You may provide a custom config file by setting the linter’s `"args"` setting to `["--config", "/path/to/file"]`. On Windows, be sure to double the backslashes in the path, for example `["--config", "C:\\Users\\Username\\htmlhint.conf"]`.
 
 The path to the `.htmlhintrc` file is cached, meaning if you create a new `.htmlhintrc` that should have precedence over the previous one (meaning it is closer to the .js file) you need to clear the cache for the linter to use the new `.htmlhintrc` You can clear the cache by going to: Tools > SublimeLinter > Clear Caches.
 
@@ -89,11 +73,11 @@ Project initially created by [@mmaday](https://github.com/mmaday) and transferre
 
 [MIT License](./LICENSE)
 
-[docs]: http://sublimelinter.readthedocs.org
-[installation]: http://sublimelinter.readthedocs.org/en/latest/installation.html
-[locating-executables]: http://sublimelinter.readthedocs.org/en/latest/usage.html#how-linter-executables-are-located
+[docs]: https://sublimelinter.readthedocs.org
+[installation]: https://sublimelinter.readthedocs.io/en/latest/installation.html
+[locating-executables]: https://sublimelinter.readthedocs.io/en/latest/usage.html#how-linter-executables-are-located
 [pc]: https://sublime.wbond.net/installation
-[cmd]: http://docs.sublimetext.info/en/sublime-text-3/extensibility/command_palette.html
-[settings]: http://sublimelinter.readthedocs.org/en/latest/settings.html
-[linter-settings]: http://sublimelinter.readthedocs.org/en/latest/linter_settings.html
-[inline-settings]: http://sublimelinter.readthedocs.org/en/latest/settings.html#inline-settings
+[cmd]: https://www.docs.sublimetext.info/index.html
+[settings]: https://sublimelinter.readthedocs.io/en/latest/settings.html
+[linter-settings]: https://sublimelinter.readthedocs.io/en/latest/linter_settings.html
+[inline-settings]: https://sublimelinter.readthedocs.io/en/latest/settings.html#inline-settings