add icons, usage and testing at readme

README.md

@@ -1,5 +1,12 @@
 # Sylius Product Deposit Plugin
-The deposit plugin in Sylius allows you to set an amount of refundable deposit for any product. For example: deposit for car replacement parts, batteries or bottle deposit for drinks.
+
+[![Latest Version on Packagist][ico-version]][link-packagist]
+[![Software License][ico-license]](LICENSE)
+[![Build Status][ico-travis]][link-travis]
+[![Quality Score][ico-code-quality]][link-code-quality]
+
+The product deposit plugin in Sylius allows you to set an amount of refundable deposit price for any product. 
+For example: deposit for bottles, cans, pallets, batteries or car replacement parts.
 
 ## Features
  * Store individual deposit prices for each product variant and channel
@@ -22,7 +29,6 @@ Register the plugin by adding it to your `config/bundles.php` file
 return [
     // ...
     \Gweb\SyliusProductDepositPlugin\GwebSyliusProductDepositPlugin::class => ['all' => true],
-    // ...
 ];
 ```
 
@@ -67,7 +73,7 @@ imports:
         }
     ```
 
-- If you use `yaml` mapping:
+- If you use `yaml` mapping add also:
 
     ```yaml
     App\Entity\ProductVariant:
@@ -99,4 +105,40 @@ bin/console doctrine:migrations:migrate
 
 ## Usage
 
-TODO
+##### 1. Add a deposit price to a product variant
+![Screenshot manage product variant deposit price](docs/images/manage_product_variant_deposit.png)
+
+##### 2. Browse a product variant with deposit price
+![Screenshot product details with deposit](docs/images/product_details.png)
+
+##### 3. Buy a product with deposit price included in final product price
+![Screenshot shopping cart with deposit](docs/images/shopping_cart.png)
+
+## Testing
+
+Setup
+```bash
+$ composer install
+$ cd tests/Application
+$ yarn install
+$ yarn run gulp
+$ bin/console assets:install public -e test
+$ bin/console doctrine:schema:create -e test
+$ bin/console server:run 127.0.0.1:8080 -d public -e test
+```
+
+Run Tests
+```bash
+$ vendor/bin/behat
+$ vendor/bin/phpspec run
+$ vendor/bin/phpstan analyse -c phpstan.neon -l max src/
+```
+
+[ico-version]: https://img.shields.io/packagist/v/gweb/gweb-product-deposit-plugin.svg?style=flat-square
+[ico-license]: https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square
+[ico-travis]: https://img.shields.io/travis/gewebe/SyliusProductDepositPlugin/master.svg?style=flat-square
+[ico-code-quality]: https://img.shields.io/scrutinizer/g/gewebe/SyliusProductDepositPlugin.svg?style=flat-square
+
+[link-packagist]: https://packagist.org/packages/gweb/sylius-brand-plugin
+[link-travis]: https://travis-ci.org/gewebe/SyliusProductDepositPlugin
+[link-code-quality]: https://scrutinizer-ci.com/g/gewebe/SyliusProductDepositPlugin