Merge branch 'feature/readme' into 'master'

chore(readme): more documentation

See merge request !4

.gitlab-ci.yml

+variables:
+  DISABLE_ACCEPTANCE: "1"
+  DISABLE_FUNCTIONAL: "1"
+  IS_LIBRARY: 1
+  DISABLE_PHP_5_5: 1
+  DISABLE_CODECEPTION: 1
+
+include: 'https://gitlab.com/wpdesk/gitlab-ci/raw/master/gitlab-ci-1.2.yml'

README.md

@@ -2,48 +2,59 @@
 [![coverage report](https://gitlab.com/wpdesk/wp-wpdesk-rating-petition/badges/master/coverage.svg)](https://gitlab.com/wpdesk/wp-wpdesk-rating-petition/commits/master) 
 [![Latest Stable Version](https://poser.pugx.org/wpdesk/wp-wpdesk-rating-petition/v/stable)](https://packagist.org/packages/wpdesk/wp-wpdesk-rating-petition) 
 [![Total Downloads](https://poser.pugx.org/wpdesk/wp-wpdesk-rating-petition/downloads)](https://packagist.org/packages/wpdesk/wp-wpdesk-rating-petition) 
-[![Latest Unstable Version](https://poser.pugx.org/wpdesk/wp-wpdesk-rating-petition/v/unstable)](https://packagist.org/packages/wpdesk/wp-wpdesk-rating-petition) 
 [![License](https://poser.pugx.org/wpdesk/wp-wpdesk-rating-petition/license)](https://packagist.org/packages/wpdesk/wp-wpdesk-rating-petition)
 
 WordPress Library to ask for good rate in repository.
-===================================================
+====================================================
 
-### Usage
+## Requirements
 
-When using in shipping zones:
+PHP 7.0 or later.
+
+## Installation via Composer
+
+In order to install the bindings via Composer run the following command:
+
+```bash
+composer require wpdesk/wp-wpdesk-rating-petition
+```
+
+## Example usage
+
+### When using in shipping zones:
 ```php
-private function init_repository_rating() {
-    $time_tracker = new ShippingMethodWatcher(
+function init_repository_rating() {
+    $time_tracker = new \WPDesk\RepositoryRating\TimeWatcher\ShippingMethodInstanceWatcher(
         FedexShippingService::UNIQUE_ID,
         'plugin_activation_flexible-shipping-fedex/flexible-shipping-fedex.php',
         '28-11-2019',
         FedexShippingMethod::class
     );
-    $this->add_hookable( $time_tracker );
-    $this->add_hookable(
-        new RatingPetitionNotice(
-            $time_tracker,
-            FedexShippingService::UNIQUE_ID,
-            $this->plugin_info->get_plugin_name(),
-            'https://wpde.sk/fs-fedex-rate'
-        )
-    );
+    $time_tracker->hooks();
+    ( new \WPDesk\RepositoryRating\RatingPetitionNotice(
+        $time_tracker,
+        'flexible_shipping_fedex',
+        $this->plugin_info->get_plugin_name(),
+        'https://wpde.sk/fs-fedex-rate'
+    ) )->hooks();
 }
 ```
 
-When using in shipping method:
+### When using in shipping method:
 
 ```php
-private function init_repository_rating() {
-    $time_tracker = new ShippingMethodGlobalSettingsWatcher( FedexShippingService::UNIQUE_ID );
-    $this->add_hookable( $time_tracker );
-    $this->add_hookable(
-        new RatingPetitionNotice(
+<?php
+function init_repository_rating() {
+    $time_tracker = new \WPDesk\RepositoryRating\TimeWatcher\ShippingMethodGlobalSettingsWatcher(
+        'flexible_shipping_fedex'
+    );
+    $time_tracker->hooks();
+    ( new \WPDesk\RepositoryRating\RatingPetitionNotice(
             $time_tracker,
-            FedexShippingService::UNIQUE_ID,
+            'flexible_shipping_fedex',
             $this->plugin_info->get_plugin_name(),
             'https://wpde.sk/fs-fedex-rate'
         )
-    );
+    )->hooks();
 }
 ```

composer.json

 {
     "name": "wpdesk/wp-wpdesk-rating-petition",
+    "license": "MIT",
     "authors": [
         {
             "name": "Krzysiek",