Updated parent version, site model and examples

Author: robtimus

pom.xml

@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.github.robtimus</groupId>
     <artifactId>robtimus-parent</artifactId>
-    <version>1.14</version>
+    <version>1.15</version>
     <relativePath />
   </parent>