Update README.txt

Closes #3321893

README.md

+# PREVIOUS/NEXT API
+
+## CONTENTS OF THIS FILE
+
+ - Introduction
+ - Requirements
+ - Installation
+ - Configuration
+ - Maintainers
+
+## INTRODUCTION
+
+This module allows you to know the previous or next nodes for any given node.
+This is very useful for providing navigational links to the user without the
+expensive queries required to dynamically deduce such information on the fly.
+
+  - For a full description of the module, visit the project page:
+  <https://www.drupal.org/project/prev_next>
+
+  - To submit bug reports and feature suggestions, or to track changes:
+  <https://www.drupal.org/project/issues/prev_next>
+
+
+## REQUIREMENTS
+
+This module requires the following modules:
+
+  - Block (Core)
+
+
+## INSTALLATION
+
+  - Install as you would normally install a contributed Drupal module. 
+  [See](https://www.drupal.org/docs/extending-drupal/installing-modules)
+
+## CONFIGURATION
+
+  - Configure prev/next settings at /admin/config/system/prev-next.
+
+
+## INSTRUCTIONS
+
+  - Add the Prev/Next block the a region.
+  - Ensure the proper configuration is set admin/config/system/prev-next
+  - Creating new nodes will auto-index and generate the Prev and Next links.
+  - If there were already nodes created see below for indexing instructions.
+
+  - For previously created nodes you will need to bulk save them. Go to your
+  content page and under bulk actions select 'Save Content" on all nodes that
+  you want to be indexes.
+
+
+## MAINTAINERS
+
+Current maintainers:
+
+  - Naveen Valecha - https://www.drupal.org/u/naveenvalecha
+  - Ben Hosmer - https://www.drupal.org/u/bhosmer
+  - Alex Ku - https://www.drupal.org/u/alexku
+  - João Ventura - https://www.drupal.org/u/jcnventura
+  - Khalid Baheyeldin - https://www.drupal.org/u/kbahey