Adding funktion to check pasteablity

SpigotCore_Main/src/de/steamwar/sql/Schematic.java

@@ -147,6 +147,10 @@ public class Schematic {
 		updateDB();
 	}
 
+	public boolean availible(){
+		return Core.getVersion() > 12 || !schemFormat;
+	}
+
 	public Clipboard load() throws WrongVersionException, IOException, NoClipboardException {
 		if(Core.getVersion() <= 12 && schemFormat)
 			throw new WrongVersionException();