title: Bukkit conversation fails sleeping
body: <p>I'm trying to use a Bukkit conversation, which already works, yet, when I use <code>TimeUnit.SECONDS.sleep(integer-value)</code>, it works once, and then it fails with this error in console: <code>java.lang.InterruptedException: sleep interrupted</code></p>
  
  <p>When a prompt has been shown and the next is going to be shown the method <em>acceptInput</em> is called. In the first prompt it works all fine, in the other prompts, which are called out of this prompt (the prompt calls a new instance of itself). All works fine except the sleep part. Any ideas to fix this?</p>
  
  <p>Here is my code:</p>
  
  <pre><code>package dbx12.Test1.Tutorial.Prompts;
  
  
  import java.util.concurrent.TimeUnit;
  
  import org.bukkit.conversations.ConversationContext;
  import org.bukkit.conversations.Prompt;
  import org.bukkit.entity.Player;
  
  
  public class Text implements Prompt {
  
      @Override
      public Prompt acceptInput(ConversationContext context, String input) {
          int thisPrompt = (int) context.getSessionData("step");
          context.setSessionData("step", thisPrompt+1);
          Player p = (Player) context.getForWhom();
  
          boolean type;
  
          try {
              TimeUnit.SECONDS.sleep(dbx12.Test1.Utils.Prompt_List.delay.get(thisPrompt));
          } catch (InterruptedException e) {
              Thread.currentThread().interrupt();
              e.printStackTrace(); //DEBUG
          }       
  
          try {
              type = dbx12.Test1.Utils.Prompt_List.promptType.get(thisPrompt+1);
          } catch (Exception e) {
              return new Finish();
          }
  
          if(dbx12.Test1.Utils.Prompt_List.hasLocation.get(thisPrompt+1) == true)
              p.teleport(dbx12.Test1.Utils.Prompt_List.location.get(thisPrompt+1));
  
          if(type==true)
          {
              System.out.println("return a text");
              return new Text();
          }
          else
          {
              System.out.println("return a interaction");
              return new Interaction();
          }
      }
  
      @Override
      public boolean blocksForInput(ConversationContext context) {
          return false;
      }
  
      @Override
      public String getPromptText(ConversationContext context) {
          return dbx12.Test1.Utils.Prompt_List.promptText.get(context.getSessionData("step"));
      }
  
  }
  </code></pre>