Update README.md

README.md

 # MonitSecArc
 MontiSecArc (MSA) is a Security Architecture Description Language. This repository contains tooling based on MontiCore for Security Architecture Analysis and development of generators to derive code from MSA models.
 
-#Licenses
+# Licenses
 * [LGPL V3.0](https://github.com/MontiCore/monticore/tree/master/00.org/Licenses/LICENSE-LGPL.md) (for handwritten Java code)
 * [BSD-3-Clause](https://github.com/MontiCore/monticore/tree/master/00.org/Licenses/LICENSE-BSD3CLAUSE.md) (for templates and generated Java code)
 
@@ -18,8 +18,8 @@ cd examples/montiSecArcAnalysis/
 ./startExample.sh
 ```
 
-#Build
-Make sure you have access to MontiCore version 3.
+# Build
+Make sure you have access to MontiCore version 3. Then run the maven build:
 ```
 cd core
 mvn clean install