fix(notify): always send override: true on public notify method

This will allow manual calls to `.notify()`

fixes #538

Author: shakyShane

lib/public/notify.js

@@ -11,7 +11,8 @@ module.exports = function (browserSync) {
         if (msg) {
             browserSync.events.emit("browser:notify", {
                 message: msg,
-                timeout: timeout || 2000
+                timeout: timeout || 2000,
+                override: true
             });
         }
     };