Updates on Readme

README.md

 This is the API of Cars & Co to send a contract and payment information (JSON-file) to our workflow implementation.
 
+## How to integrate the API?
+missing.
+
 ## How to use the API?
 In the CarsandCoApiClient.java there are two methods:
-    1. sendContract(RepairContract contract)
-    2. sendPaymentNotification(PaymentNotification note)
+
+1. sendContract(RepairContract contract)
+2. sendPaymentNotification(PaymentNotification note)
+
 These functions take the defined object, convert it into JSON and send it to our endpoints via HTTP POST.
 In order to use them, just create the corresponding object needed for those functions with the API and fill it with the required data.
 All attributes are described with JavaDoc commentary.
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