Change message verification task to add todo comments in same order

- Make verification task add todo comments to YML files in the same order as the MessageKey enum
- Use DefaultCharsets everywhere instead of Guava's Charsets class (thanks to DNx5)

src/test/java/tools/messages/translation/ImportMessagesTask.java

@@ -1,6 +1,5 @@
 package tools.messages.translation;
 
-import com.google.common.base.Charsets;
 import com.google.common.io.Resources;
 import com.google.gson.Gson;
 import fr.xephi.authme.output.MessageKey;
@@ -15,6 +14,7 @@ import tools.utils.ToolsConstants;
 import java.io.File;
 import java.io.IOException;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.util.HashSet;
 import java.util.Scanner;
 import java.util.Set;
@@ -56,7 +56,7 @@ public class ImportMessagesTask implements ToolTask {
     private LanguageExport getLanguageExportFromUrl(String location) {
         try {
             URL url = new URL(location);
-            String json = Resources.toString(url, Charsets.UTF_8);
+            String json = Resources.toString(url, StandardCharsets.UTF_8);
             return gson.fromJson(json, LanguageExport.class);
         } catch (IOException e) {
             throw new IllegalStateException(e);