updated readme to include trademark symbol

+ adjusted intro text

README.md

@@ -2,15 +2,17 @@
   <img src="https://eclipse.org/ditto/images/ditto.svg" alt="Ditto Logo" width="100%" height="250">
 </a>
 
-# Eclipse Ditto
+# Eclipse Ditto™
 
 [![Join the chat at https://gitter.im/eclipse/ditto](https://badges.gitter.im/eclipse/ditto.svg)](https://gitter.im/eclipse/ditto?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Build Status](https://github.com/eclipse/ditto/workflows/build/badge.svg)](https://github.com/eclipse/ditto/actions?query=workflow%3Abuild)
 [![Maven Central](https://img.shields.io/maven-central/v/org.eclipse.ditto/ditto?label=maven)](https://search.maven.org/search?q=g:org.eclipse.ditto)
 [![License](https://img.shields.io/badge/License-EPL%202.0-green.svg)](https://opensource.org/licenses/EPL-2.0)
 [![Lines of code](https://img.shields.io/badge/dynamic/xml.svg?label=Lines%20of%20code&url=https%3A%2F%2Fwww.openhub.net%2Fprojects%2Feclipse-ditto.xml%3Fapi_key%3D11ac3aa12a364fd87b461559a7eedcc53e18fb5a4cf1e43e02cb7a615f1f3d4f&query=%2Fresponse%2Fresult%2Fproject%2Fanalysis%2Ftotal_code_lines&colorB=lightgrey)](https://www.openhub.net/p/eclipse-ditto)
 
-[Eclipse Ditto](https://eclipse.org/ditto/) is an open-source project in scope of Eclipse IoT that provides a ready-to-use functionality to manage the state of Digital Twins. It provides access to them and mediates between the physical world and this digital representation.  
+[Eclipse Ditto](https://eclipse.org/ditto/)™ is a technology in the IoT implementing a software pattern called “digital twins”.  
+A digital twin is a virtual, cloud based, representation of his real world counterpart (real world “Things”, e.g. devices like sensors, smart heating, connected cars, smart grids, EV charging stations, …).
+
 An ever growing list of [adopters](https://iot.eclipse.org/adopters/?#iot.ditto) makes use of Ditto as part of their IoT platforms - if you're as well using it, it would be super nice to show your [adoption here](https://iot.eclipse.org/adopters/how-to-be-listed-as-an-adopter/).
 
 ## Documentation