buzzer almost complete, need tests

Microwave.App/Microwave.App.csproj

Microwave.App/Program.cs

Microwave.Classes/Boundary/Buzzer.cs

Microwave.Classes/Controllers/CookController.cs

Microwave.Classes/Controllers/UserInterface.cs

Microwave.Classes/Interfaces/IBuzzer.cs

Microwave.Classes/Microwave.Classes.csproj

Microwave.Classes/Sounds/done.wav

Microwave.Classes/Sounds/keybeep.wav

Microwave.Classes/Sounds/no.wav

Microwave.Classes/Sounds/ohoh.wav

Microwave.Classes/Sounds/ok.wav

Microwave.Classes/Sounds/yes.wav

Microwave.Test.Unit/Microwave.Test.Unit.csproj