Improved errror messages for when TheTVDB is down and sends back invalid xml.

e.g.
```
<?xml version="1.0" encoding="UTF-8" ?>
Could not connect: Too many connections
```

source/net/filebot/CachedResource.java

@@ -25,6 +25,7 @@ import org.w3c.dom.Document;
 import net.filebot.util.ByteBufferInputStream;
 import net.filebot.util.ByteBufferOutputStream;
 import net.filebot.util.JsonUtilities;
+import net.filebot.web.InvalidResponseException;
 import net.filebot.web.WebRequest;
 
 public class CachedResource<K, R> implements Resource<R> {
@@ -98,12 +99,13 @@ public class CachedResource<K, R> implements Resource<R> {
 
 				return parse.transform(data);
 			} catch (Exception e) {
-				debug.severe(format("Fetch failed: %s [%s]", e, url));
+				debug.log(Level.SEVERE, "Fetch failed: " + url, e);
 
 				// use previously cached data if possible
 				if (element == null || element.getObjectValue() == null) {
 					throw e;
 				}
+
 				return element.getObjectValue();
 			}
 		});
@@ -169,8 +171,7 @@ public class CachedResource<K, R> implements Resource<R> {
 				WebRequest.validateXml(xml);
 				return xml;
 			} catch (Exception e) {
-				debug.log(Level.WARNING, xml, e);
-				throw e;
+				throw new InvalidResponseException("Invalid XML", xml, e);
 			}
 		};
 	}
@@ -182,8 +183,7 @@ public class CachedResource<K, R> implements Resource<R> {
 				JsonUtilities.readJson(json);
 				return json;
 			} catch (Exception e) {
-				debug.log(Level.WARNING, json, e);
-				throw e;
+				throw new InvalidResponseException("Invalid JSON", json, e);
 			}
 		};
 	}

source/net/filebot/ui/rename/RenamePanel.java

@@ -83,6 +83,7 @@ import net.filebot.web.AudioTrackFormat;
 import net.filebot.web.Episode;
 import net.filebot.web.EpisodeFormat;
 import net.filebot.web.EpisodeListProvider;
+import net.filebot.web.InvalidResponseException;
 import net.filebot.web.Movie;
 import net.filebot.web.MovieFormat;
 import net.filebot.web.MovieIdentificationService;
@@ -904,8 +905,21 @@ public class RenamePanel extends JComponent {
 						// add remaining file entries
 						renameModel.files().addAll(remainingFiles);
 					} catch (Exception e) {
+						// ignore cancellation exception
+						if (findCause(e, CancellationException.class) != null) {
+							return;
+						}
+
+						// common error message
+						if (findCause(e, InvalidResponseException.class) != null) {
+							log.log(Level.WARNING, findCause(e, InvalidResponseException.class).getMessage());
+							return;
+						}
+
+						// generic error message
 						if (findCause(e, CancellationException.class) == null) {
 							log.log(Level.WARNING, String.format("%s: %s", getRootCause(e).getClass().getSimpleName(), getRootCauseMessage(e)), e);
+							return;
 						}
 					} finally {
 						// auto-match finished

source/net/filebot/web/InvalidResponseException.java

@@ -0,0 +1,15 @@
+package net.filebot.web;
+
+import java.io.IOException;
+
+public class InvalidResponseException extends IOException {
+
+	public InvalidResponseException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public InvalidResponseException(String message, String content, Throwable cause) {
+		super(String.format("%s: %s: %s\n%s", message, cause.getClass().getSimpleName(), cause.getMessage(), content), cause);
+	}
+
+}