Updated README.md

Author: fank

README.md

@@ -2,3 +2,26 @@ CategorieAccessRestriction
 ==========================
 
 Idea based on Andrés Orencio Ramírez Pérez project on Mediawiki (http://www.mediawiki.org/wiki/Extension:Restrict_access_by_category_and_group)
+
+## Installation
+
+### Using git clone
+- Clone the extension in your MediaWiki extension folder
+
+### Using source files
+- Create folder called **CategorieAccessRestriction** in your extension folder
+- Copy all files in yout **CategorieAccessRestriction** folder
+
+- Now edit LocalSettings.php and add the following lines
+```php
+require_once("$IP/extensions/CategorieAccessRestriction/CategorieAccessRestriction.php");
+```
+
+- Now add the Pattern
+```php
+$wgCARPattern = '//';
+```
+
+## Usage
+The **$wgCARPattern** is a RegEx pattern which matches the categories on a pages, and these matches are needed to the user to access the page, otherwise he will get a ACCESS DENIED.
+For example to match all groups starting with **CAR_**: **'/CAR_/'** the pattern is case sensitive.