added static:app.reload closes #4002

src/meta.js

@@ -53,6 +53,9 @@ var async = require('async'),
 
 		var	plugins = require('./plugins');
 		async.series([
+			function (next) {
+				plugins.fireHook('static:app.reload', {}, next);
+			}
 			async.apply(plugins.clearRequireCache),
 			async.apply(plugins.reload),
 			async.apply(plugins.reloadRoutes),