docs: added some comments about tokens, verify, test mode, etc

Mage.Client/src/main/java/org/mage/card/arcane/CardPanelRenderModeMTGO.java

@@ -23,9 +23,13 @@ import java.util.concurrent.TimeUnit;
 
 /**
  * Render mode: MTGO
+ *
  */
 public class CardPanelRenderModeMTGO extends CardPanel {
 
+    //
+    // https://www.mtg.onl/evolution-of-magic-token-card-frame-design/
+
     // Map of generated images
     private final static Cache<ImageKey, BufferedImage> IMAGE_CACHE = CacheBuilder
             .newBuilder()

Mage.Client/src/main/java/org/mage/card/arcane/ModernCardRenderer.java

@@ -55,6 +55,7 @@ import static org.mage.card.arcane.ManaSymbols.getSizedManaSymbol;
  * @author stravant@gmail.com, JayDi85
  * <p>
  * Base rendering class for new border cards
+ * M15 frame style, for another styles see https://www.mtg.onl/evolution-of-magic-token-card-frame-design/
  */
 public class ModernCardRenderer extends CardRenderer {
 

Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/AltMtgOnlTokensImageSource.java

@@ -10,6 +10,10 @@ import java.util.List;
 import java.util.Map;
 
 /**
+ *  * TODO: web site reworked and tokens doesn't work anymore,
+ *  *  but it can be used to download a proxy tokens (tokens that was miss by wizards),
+ *  *  see https://www.mtg.onl/mtg-missing-tokens/
+ *
  * @author spjspj
  */
 public enum AltMtgOnlTokensImageSource implements CardImageSource {

Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/MtgOnlTokensImageSource.java

@@ -10,6 +10,10 @@ import java.util.List;
 import java.util.Map;
 
 /**
+ * TODO: web site reworked and tokens doesn't work anymore,
+ *  but it can be used to download a proxy tokens (tokens that was miss by wizards),
+ *  see https://www.mtg.onl/mtg-missing-tokens/
+ *
  * @author spjspj
  */
 public enum MtgOnlTokensImageSource implements CardImageSource {