Created a README and updated the composer.json.

README.md

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+# BitsoAPI Wrapper for PHP 7  #
+
+A wrapper for the [Bitso® API] (https://bitso.com/api_info/) made in PHP 7 and Symfony 4 
+
+# Motivation #
+
+I'm a Developer that use Bitso as platform for buying and selling Cryptocurrencies, 
+and Bitso provides an API in order to create new ways to communicate with theirs systems
+so I searched for a composer package for abstract the API requests in PHP and
+I found the official [bitso-php library] (https://github.com/bitsoex/bitso-php) but seems 
+that this library is made in old an ugly PHP (the kind of PHP that all we hate)
+so I created this project in order to try replicate the functionality but with a better implementation
+and new technologies, like PHP 7 and Symfony 4. 
+
+I hope this could be useful for someone. 
+
+# Installation #
+To install the bitso-api-php api wrapper:
+`$ composer require briones/bitso-api-php`
+or equivalently in your composer.json file:
+```json
+{
+    "require": {
+        "briones/bitsoAPI-php": "master"
+    }
+}
+```
+
+# Public API Usage #
+
+```php
+
+use App\Entity\BitsoPublicApi;
+
+$bitsoPrivateApi = new BitsoPublicApi();...
+
+UNDER CONSTRUCTION

composer.json

@@ -1,6 +1,16 @@
 {
-    "type": "project",
-    "license": "proprietary",
+    "name": "briones/bitso-api-php",
+    "description": "A Wrapper for Bitso API made in PHP 7 and Symfony 4",
+    "type": "library",
+    "license": "MIT",
+    "keywords": ["api","bitso","php"],
+    "homepage": "https://github.com/Briones/BitsoAPI-PHP",
+    "authors": [
+        {
+            "name": "Roberto Briones",
+            "email": "[email protected]"
+        }
+    ],
     "require": {
         "php": "^7.1.3",
         "guzzlehttp/guzzle": "~6.0",