Issue #3331699: Replace README.txt to README.md and update README.md

README.md

-CONTENTS OF THIS FILE
----------------------
-
- * Introduction
- * Requirements
- * Installation
- * Configuration
- * Maintainers
-
-
-INTRODUCTION
-------------
+# Chain Menu Access API
 
 Chain Menu Access API has no functionality on its own — install it only if
 another module requests it.
@@ -17,41 +6,44 @@ The remainder of this page is directed towards module developers:
 Chain Menu Access API allows your module to chain its own menu access callback
 functions into other modules' menu router entries.
 
- * For a full description of the module, visit the project page:
-   https://www.drupal.org/project/chain_menu_access
+For a full description of the module, visit the
+[project page](https://www.drupal.org/project/chain_menu_access).
 
- * To submit bug reports and feature suggestions, or to track changes:
-   https://www.drupal.org/project/issues/chain_menu_access
+Submit bug reports and feature suggestions, or track changes in the
+[issue queue](https://www.drupal.org/project/issues/chain_menu_access).
 
 
-REQUIREMENTS
-------------
+## Table of contents
 
-This module requires no modules outside of Drupal core.
+- Requirements
+- Installation
+- Configuration
+- Maintainers
 
 
-INSTALLATION
-------------
+## Requirements
+
+This module requires no modules outside of Drupal core.
 
- * Install the Chain Menu Access API module as you would normally install a
-   contributed Drupal module. Visit
-   https://www.drupal.org/node/1897420 for further information.
 
+## Installation
 
-CONFIGURATION
--------------
+Install as you would normally install a contributed Drupal module. For further
+information, see
+[Installing Drupal Modules](https://www.drupal.org/docs/extending-drupal/installing-drupal-modules).
 
-This module is an API module. It has no functionality on its own. 
 
+## Configuration
+
+This module is an API module. It has no functionality on its own.
 Install it only if some other module requires it.
 
 
-MAINTAINERS
------------
+## Maintainers
 
- * Hans Salvisberg (salvis) - https://www.drupal.org/u/salvis
+- chx - [chx](https://www.drupal.org/u/chx)
+- Hans Salvisberg - [salvis](https://www.drupal.org/u/salvis)
+- Viktor Holovachek - [AstonVictor](https://www.drupal.org/u/astonvictor)
 
 Supporting organizations:
-
+- [Salvisberg Software & Consulting](https://www.drupal.org/salvisberg-software-consulting)
  * Salvisberg Software & Consulting -
\ No newline at end of file
-   https://www.drupal.org/salvisberg-software-consulting