Added Sound manager Added the ability to send user notifications to the UI.
Added Sound manager
Added the ability to send user notifications to the UI.

JKatzwinkel/settlers-remake,Peter-Maximilian/settlers-remake,andreas-eberle/settlers-remake,jsettlers/settlers-remake,jsettlers/settlers-remake,phirschbeck/settlers-remake,andreasb242/settlers-remake,phirschbeck/settlers-remake,phirschbeck/settlers-remake,jsettlers/settlers-remake,andreasb242/settlers-remake,andreasb242/settlers-remake,andreas-eberle/settlers-remake,andreas-eberle/settlers-remake