fix log path and java warnings

src/main/java/com/commafeed/frontend/CommaFeedSession.java

@@ -11,6 +11,7 @@ import com.commafeed.backend.dao.UserService;
 import com.commafeed.frontend.components.auth.Role;
 import com.commafeed.model.User;
 
+@SuppressWarnings("serial")
 public class CommaFeedSession extends AuthenticatedWebSession {
 
 	@Inject

src/main/java/com/commafeed/frontend/components/CssTreeView.java

@@ -16,6 +16,7 @@ import org.apache.wicket.model.IModel;
 
 import com.commafeed.frontend.references.csstree.CssTreeViewReference;
 
+@SuppressWarnings("serial")
 public abstract class CssTreeView<T, V> extends Panel {
 
 	private ITreeProvider<T, V> provider;

src/main/java/com/commafeed/frontend/pages/BasePage.java

@@ -9,6 +9,7 @@ import com.commafeed.frontend.components.auth.Role;
 import de.agilecoders.wicket.Bootstrap;
 
 @AuthorizeInstantiation(Role.USER)
+@SuppressWarnings("serial")
 public abstract class BasePage extends WebPage {
 
 	@Override

src/main/java/com/commafeed/frontend/pages/feed/FeedViewPage.java

@@ -25,6 +25,7 @@ import com.google.common.base.Predicate;
 import com.google.common.collect.Collections2;
 import com.google.common.collect.Lists;
 
+@SuppressWarnings("serial")
 public class FeedViewPage extends BasePage {
 
 	@Inject

src/main/java/com/commafeed/frontend/pages/home/HomePage.java

@@ -2,6 +2,7 @@ package com.commafeed.frontend.pages.home;
 
 import com.commafeed.frontend.pages.BasePage;
 
+@SuppressWarnings("serial")
 public class HomePage extends BasePage {
 
 }

src/main/java/com/commafeed/frontend/references/csstree/CssTreeViewReference.java

@@ -8,6 +8,7 @@ import org.apache.wicket.request.resource.CssResourceReference;
  * http://experiments.wemakesites.net/css3-treeview.html
  * 
  */
+@SuppressWarnings("serial")
 public class CssTreeViewReference extends CssResourceReference {
 	private static CssTreeViewReference instance = new CssTreeViewReference();