Fix Ant build from Eclipse (add guava library to the classpath)

Author: monchote

.classpath

@@ -8,5 +8,6 @@
 	<classpathentry kind="lib" path="lib/testing/easymock-3.1.jar"/>
 	<classpathentry kind="lib" path="lib/testing/hamcrest-core-1.3.jar"/>
 	<classpathentry kind="lib" path="lib/testing/junit-4.11.jar"/>
+	<classpathentry kind="lib" path="lib/guava-18.0.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>