Update README.

Author: ABGEO

README.md

@@ -1,2 +1,88 @@
 # gen-md
 PHP Library for generating Markdown document
+
+
+[![GitHub license](https://img.shields.io/github/license/ABGEO07/gen-md.svg)](https://github.com/ABGEO07/gen-md/blob/master/LICENSE)
+
+[![GitHub release](https://img.shields.io/github/release/ABGEO07/gen-md.svg)](https://github.com/ABGEO07/gen-md/releases)
+
+[![Packagist Version](https://img.shields.io/packagist/v/abgeo/gen-md.svg "Packagist Version")](https://packagist.org/packages/abgeo/gen-md "Packagist Version")
+
+---
+
+## Installation
+
+You can install this library with [Composer](https://getcomposer.org/):
+
+- `composer require abgeo/gen-md`
+    
+## Usage
+
+Include composer autoloader in your main file (Ex.: index.php)
+
+- `require_once __DIR__ . '/../vendor/autoload.php';`
+
+### Classes
+
+The library has two classes:
+
+* `\ABGEO\MDGenerator\Document` - For generating Markdown Document;
+* `\ABGEO\MDGenerator\Element` - For generating Markdown element;
+
+#### Class `Document`
+
+Import `ABGEO\MDGenerator\Document` class.
+
+##### Public Methods
+
+- `addElement()` - Add element to Document content;
+- `clear()` -Clear Document content;
+
+**Note: See usage in [example.php](examples/example.php)**
+
+#### Class `Element`
+
+Import `ABGEO\MDGenerator\Element` class.
+
+##### Public Methods
+
+- `concatenateElements()` - Concatenate given elements;
+- `createHeading()` - Create heading element;
+- `createParagraph()` - Create Paragraph element;
+- `createBreak()` - Create Line Break element;
+- `createBold()` - Create Bold element;
+- `createItalic()` - Create Italic element;
+- `createBoldAndItalic()` - Create Bold and Italic element;
+- `createBlockquote()` - Create Blockquote element;
+- `createList()` - Create List element;
+- `createLine()` - Create Line element;
+- `createLink()` - Create Link element;
+- `createImage()` - Create Image element;
+
+**Note: See usage in [example.php](examples/example.php)**
+
+### Exporting
+
+The `ABGEO\MDGenerator\Document` class has `export2File()` method that takes one argument
+- File path for generated document.
+
+### Example
+
+```php
+...
+// Export document to file.
+$document->export2File(__DIR__ . '/generated/example.MD');
+...
+```
+
+## Examples
+
+See full example in [example.php](examples/example.php).
+
+## Authors
+
+* **Temuri Takalandze** - *Initial work* - [ABGEO](https://abgeo.dev)
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details