Revert "Update example to 0.5.0" until it gets released.

This reverts commit 3acdedbce0c18df04ba8147a3da2fd448a5ede24.
diff --git a/commons-rdf-examples/pom.xml b/commons-rdf-examples/pom.xml
index 44cc8df..995cfae 100644
--- a/commons-rdf-examples/pom.xml
+++ b/commons-rdf-examples/pom.xml
@@ -58,13 +58,13 @@
     		<groupId>org.apache.commons</groupId>
     		<artifactId>commons-rdf-api</artifactId>
         <!-- update to latest version -->
-    		<version>0.5.0</version>
+    		<version>0.3.0</version>
     	</dependency>
     	<dependency>
     		<groupId>org.apache.commons</groupId>
     		<artifactId>commons-rdf-simple</artifactId>
         <!-- update to latest version -->
-    		<version>0.5.0</version>
+    		<version>0.3.0</version>
     	</dependency>
     	<dependency>
     		<groupId>junit</groupId>