added Leaderboard interface with first little test cases

Also, streamlined pom.xml files

java/com.googlecode.java-diff-utils.test/.classpath

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry exported="true" kind="lib" path="test/"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="src" path="src"/>
+	<classpathentry exported="true" kind="lib" path="test" sourcepath="test"/>
+	<classpathentry kind="src" path="src/"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>

java/com.googlecode.java-diff-utils.test/.project

@@ -20,8 +20,14 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 	</natures>

java/com.googlecode.java-diff-utils.test/pom.xml

@@ -7,7 +7,6 @@
     <groupId>com.sap.sailing</groupId>
     <version>0.0.1-SNAPSHOT</version>
   </parent>
-  <groupId>com.sap.sailing</groupId>
   <artifactId>com.googlecode.java-diff-utils.test</artifactId>
   <version>1.0.0-SNAPSHOT</version>
   <packaging>eclipse-test-plugin</packaging>