README: Add install info.

Author: janbarasek

README.md

@@ -3,6 +3,28 @@ Simple PHP diff
 
 Find the quick difference between two text files in PHP.
 
+Idea
+----
+
+The library compares two text files very quickly and returns the object with the differences.
+
+The difference has numbered lines for easy display of changes to the user. You can also read an array of changed rows as an integer array from the `Diff` object as you browse for changes.
+
+📦 Installation
+---------------
+
+It's best to use [Composer](https://getcomposer.org) for installation, and you can also find the package on
+[Packagist](https://packagist.org/packages/baraja-core/simple-php-diff) and
+[GitHub](https://github.com/baraja-core/simple-php-diff).
+
+To install, simply use the command:
+
+```
+$ composer require baraja-core/simple-php-diff
+```
+
+You can use the package manually by creating an instance of the internal classes, or register a DIC extension to link the services directly to the Nette Framework.
+
 Example
 -------
 
@@ -12,13 +34,6 @@ Diff can be rendered to HTML (with native method `SimpleDiff::renderDiff($diff)`
 
 ![Default theme](doc/diff-to-html.png)
 
-Idea
-----
-
-The library compares two text files very quickly and returns the object with the differences.
-
-The difference has numbered lines for easy display of changes to the user. You can also read an array of changed rows as an integer array from the `Diff` object as you browse for changes.
-
 How to use
 ----------
 
@@ -67,3 +82,9 @@ Comparison mode
 
 This tool supports strict and basic comparison modes (strict mode is disabled by default).
 Strict mode also allows you to compare changes in different line wrapping methods (for example, `"\n"` and so on).
+
+
+📄 License
+-----------
+
+`baraja-core/simple-php-diff` is licensed under the MIT license. See the [LICENSE](https://github.com/baraja-core/template/blob/master/LICENSE) file for more details.