Defined VcCodecBase, new Vc interfaces and started CiscoCodec class

Essentials Core/PepperDashEssentialsBase/Devices/IHasDialer.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+
+namespace PepperDash.Essentials.Core
+{
+    /// <summary>
+    /// Requirements for a device that has dialing capabilities
+    /// </summary>
+    public interface IHasDialer
+    {
+        // Add requirements for Dialer functionality
+
+        void Dial();
+        void EndCall();
+
+        BoolFeedback InCallFeedback { get; }
+
+    }
+}