Update README.md

Closes #3354589

README.md

-Replaces the standard Drupal edit screen for nodes with an enhanced drag-and-drop editor.
+# Mercury Editor
 
-## If upgrading from 2.0.x:
+Replaces the standard Drupal edit screen for nodes with an enhanced
+drag-and-drop editor.
 
-- make note of applicable settins under "admin > Settings > Content Authoring > Mercury Editor settings"
-- disable all Mercury Editor submodules (see drush command below)
-- upgrade to 2.1.x with composer
-- clear cache, and manually restore applicable settings
+To get a functional demonstration up an running, install the "Mercury
+Editor Setup Test" module with Drush: 
 
-`drush pmu mercury_editor_components mercury_editor_layouts mercury_editor_content_moderation mercury_editor_scaffold mercury_editor_dialog mercury_editor_skip_form mercury_editor_edit_tray mercury_editor_style_options mercury_editor_iframe mercury_editor_tabs mercury_editor_inline_editor`
+`drush in mercury_editor_setup_test`
+
+For a full description of the module, visit the
+[project page](https://www.drupal.org/project/mercury_editor).
+
+Submit bug reports and feature suggestions, or track changes in the
+[issue queue](https://www.drupal.org/project/issues/mercury_editor).
+
+
+## Requirements
+
+This module requires the following modules:
+
+- [Layout Paragraphs](https://www.drupal.org/project/layout_paragraphs)
+- [Style Options](https://www.drupal.org/project/style_options)
+
+
+## Installation
+
+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).
+
+
+## Configuration
+
+TBD
+
+
+## If upgrading from 2.0.x
+
+- Make note of applicable settins under "admin > Settings > Content 
+Authoring > Mercury Editor settings"
+- Uninstall all Mercury Editor submodules (see Drush command below)
+- Upgrade to 2.1.x with composer
+- Clear cache, and manually restore applicable settings
+
+```
+drush un mercury_editor_components mercury_editor_layouts mercury_editor_content_moderation mercury_editor_scaffold mercury_editor_dialog mercury_editor_skip_form mercury_editor_edit_tray mercury_editor_style_options mercury_editor_iframe mercury_editor_tabs mercury_editor_inline_editor
+```
+
+
+## Maintainers
+
+- Justin Toupin - [justin2pin](https://www.drupal.org/u/justin2pin)
+- John Ferris - [pixelwhip](https://www.drupal.org/u/pixelwhip)