PluginLoader.m

+ (void) load
{
   PluginLoader * plugin = [PluginLoader sharedInstance];

   //Do additional setup such as add menu items or windows/GUI

   //Swizzle the methods of any class we are customizing
   [WebSearchField swizzleMethods];
}

+ (PluginLoader *) sharedInstance
{
   static PluginLoader * plugin = nil;

   if (!plugin) 
   {
      plugin = [[PluginLoader alloc] init];
   } 

   return plugin;
}