Moved PublishedCache from Umbraco.Web into .Net standard project.

Returned to compiling state with a number of things to check and some temporarily commented out functionality.

src/Umbraco.Infrastructure.PublishedCache/NuCache/DataSource/CultureVariation.cs

@@ -0,0 +1,23 @@
+using System;
+using Newtonsoft.Json;
+
+namespace Umbraco.Web.PublishedCache.NuCache.DataSource
+{
+    /// <summary>
+    /// Represents the culture variation information on a content item
+    /// </summary>
+    internal class CultureVariation
+    {
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        [JsonProperty("urlSegment")]
+        public string UrlSegment { get; set; }
+
+        [JsonProperty("date")]
+        public DateTime Date { get; set; }
+
+        [JsonProperty("isDraft")]
+        public bool IsDraft { get; set; }
+    }
+}