refs #240, moved notification sounds in project blackmisc

Notification sounds are used in BlackGui components. They require the whole Qt multimedia library. However, GUI only triggers playing the sound. As a workaround the notification sounds enumeration has been moved in an own class, and moved to the subproject BlackMisc. Hence it is possible to compile BlackGui without dependency to BlackSound.

src/blackmisc/notificationsounds.h

@@ -0,0 +1,32 @@
+#ifndef BLACKMISC_NOTIFICATIONSOUNDS_H
+#define BLACKMISC_NOTIFICATIONSOUNDS_H
+
+namespace BlackSound
+{
+
+    /*!
+     * Simplified enums to play sound. Outside BlackSound as this allows
+     * to trigger sounds without using Multimedia libraries.
+     */
+    struct CNotificationSounds
+    {
+        //! How to play?
+        enum PlayMode
+        {
+            Single,
+            SingleWithAutomaticDeletion,
+            EndlessLoop
+        };
+
+        //! Play notification
+        enum Notification
+        {
+            NotificationError = 0,
+            NotificationLogin,
+            NotificationLogoff,
+            NotificationTextMessage,
+        };
+    };
+}
+
+#endif // guard