Have a Maven default goal configured

That way any contributor can easily build by invoking maven without any
arguments, instead of going through the documentation to find the
correct command line.

Also this serves as documentation of being a good Maven project, since
it doesn't require "clean" to be used.

pom.xml

@@ -66,6 +66,7 @@
     </dependencies>
 
     <build>
+        <defaultGoal>verify</defaultGoal>
         <finalName>${project.artifactId}_${unqualifiedVersion}.${buildQualifier}</finalName>
         <testSourceDirectory>test</testSourceDirectory>
         <testResources>