Ground work for Wino Calendar. (#475)

Wino Calendar abstractions.

Wino.Core.Domain/Models/Calendar/DayHeaderRenderModel.cs

@@ -0,0 +1,14 @@
+namespace Wino.Core.Domain.Models.Calendar
+{
+    public class DayHeaderRenderModel
+    {
+        public DayHeaderRenderModel(string dayHeader, double hourHeight)
+        {
+            DayHeader = dayHeader;
+            HourHeight = hourHeight;
+        }
+
+        public string DayHeader { get; }
+        public double HourHeight { get; }
+    }
+}