Update icons, add new top 500 icons, add refresh option

README.md

@@ -72,7 +72,7 @@ If you want to add new features please first send an email to [p.bojan@live.com]
 ## MIT License
 
 ```
-Copyright (c) 2018 Bojan Petkovski
+Copyright (c) 2019 Bojan Petkovski
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

files/cryptocoins@pbojan/desklet.js

@@ -57,6 +57,9 @@ HelloDesklet.prototype = {
       this.cfgCurrency = this.cfgCurrency.toUpperCase() || 'USD';
       this.cfgRefreshInterval = this.cfgRefreshInterval || 30;
 
+      this._menu.addAction('Refresh', Lang.bind(this, function () {
+        this.fetchData();
+      }));
       this._menu.addAction('Help', Lang.bind(this, function() {
         Util.spawnCommandLine('xdg-open ' + HELP_URL);
       }));