Maven usage section updated

Author: LorenzBuehmann

README.md

@@ -59,7 +59,7 @@ git clone https://github.com/SANSA-Stack/SANSA-Inference.git
 cd SANSA-Inference
 mvn clean install
 ```
-Afterwards, you have to add the dependency to your pom.xml
+Afterwards, you have to add the dependency to your `pom.xml`
 
 For Apache Spark
 ```xml
@@ -81,78 +81,48 @@ with `VERSION` beeing the released version you want to use.
 
 ### Using Maven pre-build artifacts
 
- 1. Add AKSW Maven repository to your pom.xml (will be added to Maven Central soon)
-```xml
-<repository>
-  <id>maven.aksw.snapshots</id>
-  <name>University Leipzig, AKSW Maven2 Repository</name>
-  <url>http://maven.aksw.org/archiva/repository/snapshots</url>
-  <releases>
-  <releases>
-	<enabled>false</enabled>
-  </releases>
-  <snapshots>
-	<enabled>true</enabled>
-  </snapshots>
-</repository>
-
-<repository>
-  <id>maven.aksw.internal</id>
-  <name>University Leipzig, AKSW Maven2 Internal Repository</name>
-  <url>http://maven.aksw.org/archiva/repository/internal</url>
-  <releases>
-	<enabled>true</enabled>
-  </releases>
-  <snapshots>
-	<enabled>false</enabled>
-  </snapshots>
-</repository>
-```
-2\. Add dependency to your pom.xml
+The latest release is available in Maven Central, thus, you only have to add the following dependency to your `pom.xml`:
 
 For Apache Spark
 ```xml
 <dependency>
   <groupId>net.sansa-stack</groupId>
   <artifactId>sansa-inference-spark_2.11</artifactId>
-  <version>VERSION</version>
+  <version>0.4.0</version>
 </dependency>
 ```
 and for Apache Flink
 ```xml
 <dependency>
   <groupId>net.sansa-stack</groupId>
   <artifactId>sansa-inference-flink_2.11</artifactId>
-  <version>VERSION</version>
+  <version>0.4.0</version>
 </dependency>
 ```
-with `VERSION` beeing the released version you want to use.
+
 ### Using SBT
-SANSA Inference API has not been published on Maven Central yet, thus, you have to add an additional repository as follows
-```scala
-resolvers ++= Seq(
-  "AKSW Maven Releases" at "http://maven.aksw.org/archiva/repository/internal",
-  "AKSW Maven Snapshots" at "http://maven.aksw.org/archiva/repository/snapshots"
-)
-```
-Then you have to add a dependency on either the Apache Spark or the Apache Flink module.
+
+Add the following lines to your SBT file:
 
 For Apache Spark add
 ```scala
-"net.sansa-stack" % "sansa-inference-spark_2.11" % VERSION
+libraryDependencies += "net.sansa-stack" % "sansa-inference-spark_2.11" % "0.4.0"
 ```
 
 and for Apache Flink add
 ```scala
-"net.sansa-stack" % "sansa-inference-flink_2.11" % VERSION
+libraryDependencies += "net.sansa-stack" % "sansa-inference-flink_2.11" % "0.4.0"
 ```
+### Using Snapshots
+
+Snapshot version are only avalibale via our custom Maven repository located at http://maven.aksw.org/archiva/repository/snapshots .
+SANSA Inference API has not been published on Maven Central yet, thus, you have to add an additional repository as follows
 
-where `VERSION` is the released version you want to use.
 
 ## Usage
 Besides using the Inference API in your application code, we also provide a command line interface with various options that allow for a convenient way to use the core reasoning algorithms:
 ```
-RDFGraphMaterializer 0.2.0
+RDFGraphMaterializer 0.4.0
 Usage: RDFGraphMaterializer [options]
 
   -i, --input <path1>,<path2>,...