Update README.md

added installation description

Author: Christian Lüthold

README.md

@@ -23,6 +23,30 @@ This is a lightweight and extensible framework for asynchronous and synchronous
 
 Coming soon!
 
+## Installation
+There are three easy ways to get and include the Hive2Hive Process Framework into your project.
+
+If you just want to use the framework, either refer to option 1 or 2.  
+If you want to [contribute to the project](#contribution), please refer to option 3.
+- **Option 1: Add Maven dependency** *(recommended)*  
+  You can add the latest stable release as an [Apache Maven](http://maven.apache.org/) dependency and fetch it from our repository. Add the following to your `pom.xml` and make sure to select the most recent version.  
+```xml
+  <repository>
+    <id>hive2hive.org</id>
+    <url>http://repo.hive2hive.org</url>
+  </repository>
+  ...
+  <dependency>
+    <groupId>org.hive2hive</groupId>
+    <artifactId>org.hive2hive.processframework</artifactId>
+    <version>1.X.X</version>
+  </dependency>
+```
+- **Option 2: Add JAR-file directly**  
+  In case you don't want to use Maven, you can just download the [latest stable release](https://github.com/Hive2Hive/ProcessFramework/releases). The required `.jar`-files is packed and delivered to you as a `.zip`.
+- **Option 3: Clone from GitHub**  
+  If you want to contribute to the Hive2Hive ProcessFramework project, this is what you should do. Cloning from the `dev` branch allows yout to get the *bleeding edge* of development. This option is not recommended if you just want to use the library.
+
 ## Documentation
 
 For more exact details and documentation about this process library, please visit http://hive2hive.com/process-framework/.