Simplify readme

Author: norkunas

README.md

@@ -8,11 +8,171 @@
 [![StyleCI](https://styleci.io/repos/34352212/shield?style=flat)](https://styleci.io/repos/34352212)
 [![License](https://poser.pugx.org/norkunas/onesignal-php-api/license)](https://packagist.org/packages/norkunas/onesignal-php-api)
 
-## Documentation
+## Install
 
-[Read the Documentation for 1.0](/docs/getting-started.md)
+This packages requires an http adapter to work. You can choose any from
+[php-http/client-implementation](https://packagist.org/providers/php-http/client-implementation)
 
-[Read the Documentation for 0.1](https://github.com/norkunas/onesignal-php-api/blob/0.1/README.md)
+Example with Guzzle v6 adapter, install it with [Composer](https://getcomposer.org/):
+
+```
+composer require php-http/guzzle6-adapter norkunas/onesignal-php-api
+```
+
+And now configure the service:
+
+```php
+<?php
+
+require __DIR__ . '/vendor/autoload.php';
+
+use GuzzleHttp\Client as GuzzleClient;
+use Http\Adapter\Guzzle6\Client as GuzzleAdapter;
+use Http\Client\Common\HttpMethodsClient as HttpClient;
+use Http\Message\MessageFactory\GuzzleMessageFactory;
+use OneSignal\Config;
+use OneSignal\OneSignal;
+
+$config = new Config();
+$config->setApplicationId('your_application_id');
+$config->setApplicationAuthKey('your_application_auth_key');
+$config->setUserAuthKey('your_auth_key');
+
+$guzzle = new GuzzleClient([ // http://docs.guzzlephp.org/en/stable/quickstart.html
+    // ..config
+]);
+
+$client = new HttpClient(new GuzzleAdapter($guzzle), new GuzzleMessageFactory());
+$api = new OneSignal($config, $client);
+```
+
+## How to use this library
+
+### Applications API
+
+View the details of all of your current OneSignal applications ([official documentation](https://documentation.onesignal.com/reference#view-apps-apps)):
+
+```php
+$myApps = $api->apps->getAll();
+```
+
+View the details of a single OneSignal application ([official documentation](https://documentation.onesignal.com/reference#view-an-app)):
+
+```php
+$myApp = $api->apps->getOne('application_id');
+```
+
+Create a new OneSignal app ([official documentation](https://documentation.onesignal.com/reference#create-an-app)):
+
+```php
+$newApp = $api->apps->add([
+    'name' => 'app name',
+    'gcm_key' => 'key'
+]);
+```
+
+Update the name or configuration settings of OneSignal application ([official documentation](https://documentation.onesignal.com/reference#update-an-app)):
+
+```php
+$api->apps->update('application_id', [
+    'name' => 'new app name'
+]);
+```
+
+### Devices API
+
+View the details of multiple devices in one of your OneSignal apps ([official documentation](https://documentation.onesignal.com/reference#view-devices)):
+
+```php
+$devices = $api->devices->getAll();
+```
+
+View the details of an existing device in your configured OneSignal application ([official documentation](https://documentation.onesignal.com/reference#view-device)):
+
+```php
+$device = $api->devices->getOne('device_id');
+```
+
+Register a new device to your configured OneSignal application ([official documentation](https://documentation.onesignal.com/reference#add-a-device)):
+
+```php
+$newDevice = $api->devices->add([
+    'device_type' => Devices::ANDROID,
+    'identifier' => 'abcdefghijklmn',
+]);
+```
+
+Update an existing device in your configured OneSignal application ([official documentation](https://documentation.onesignal.com/reference#edit-device)):
+
+```php
+$api->devices->update('device_id', [
+    'session_count' => 2,
+]);
+```
+
+### Notifications API
+
+View the details of multiple notifications ([official documentation](https://documentation.onesignal.com/reference#view-notifications)):
+
+```php
+$notifications = $api->notifications->getAll();
+```
+
+Get the details of a single notification ([official documentation](https://documentation.onesignal.com/reference#view-notification)):
+
+```php
+$notification = $api->notifications->getOne('notification_id');
+```
+
+Create and send notifications or emails to a segment or individual users.
+You may target users in one of three ways using this method: by Segment, by
+Filter, or by Device (at least one targeting parameter must be specified) ([official documentation](https://documentation.onesignal.com/reference#create-notification)):
+
+```php
+$api->notifications->add([
+    'contents' => [
+        'en' => 'Notification message'
+    ],
+    'included_segments' => ['All'],
+    'data' => ['foo' => 'bar'],
+    'isChrome' => true,
+    'send_after' => new \DateTime('1 hour'),
+    'filters' => [
+        [
+            'field' => 'tag',
+            'key' => 'is_vip',
+            'relation' => '!=',
+            'value' => 'true',
+        ],
+        [
+            'operator' => 'OR',
+        ],
+        [
+            'field' => 'tag',
+            'key' => 'is_admin',
+            'relation' => '=',
+            'value' => 'true',
+        ],
+    ],
+    // ..other options
+]));
+```
+
+Mark notification as opened ([official documentation](https://documentation.onesignal.com/reference#track-open)):
+
+```php
+$api->notifications->open('notification_id');
+```
+
+Stop a scheduled or currently outgoing notification ([official documentation](https://documentation.onesignal.com/reference#cancel-notification)):
+
+```php
+$api->notifications->cancel('notification_id');
+```
+
+## Questions?
+
+If you have any questions please [open an issue](https://github.com/norkunas/onesignal-php-api/issues/new).
 
 ## License