Make build documentation a bit more verbose

pom.xml

@@ -63,6 +63,14 @@
 						<goals>
 							<goal>antlr4</goal>
 						</goals>
+						
+						<!--
+							NOTE 
+							Make sure to keep the generated package as well as the output path in sync!
+							I was unable to find a cleaner solution which takes care of everything on-the-fly.
+							(Thought I would expect such a solution to expect, the SBT plugin is way nicer there...)
+						 -->
+						
 						<configuration>
 							<arguments>
 								<argument>-package</argument>