Improve output: distinguish between failed assertions (failures) and unexpected exceptions (errors), and print a filtered stack trace for any exception.

webapp/web/jenaIngest/createModel.jsp

@@ -0,0 +1,9 @@
+<%-- $This file is distributed under the terms of the license in /doc/license.txt$ --%>
+
+    <h2>Create New Model</h2>
+
+    <form style="margin-bottom:2ex;" action="ingest" method="post">
+        <input type="hidden" name="action" value="createModel"/>
+	Model name: <input type="text" size="32" name="modelName"/>
+        <input type="submit" name="submit" value="Create Model"/>
+    </form>