- Moved ModelsBuilder constant into Core under constants

- Move the registration of configs into the factory
- Moved extension methods of ModelsMode into Umbraco.Core
- Removed references to Umbraco.Configuration from Umbraco.Infrastructure and Umbraco.ModelsBuilder.Embedded

src/Umbraco.Core/Configuration/ModelsModeExtensions.cs

@@ -0,0 +1,39 @@
+using Umbraco.Core.Configuration;
+
+namespace Umbraco.Configuration
+{
+    /// <summary>
+    /// Provides extensions for the <see cref="ModelsMode"/> enumeration.
+    /// </summary>
+    public static class ModelsModeExtensions
+    {
+        /// <summary>
+        /// Gets a value indicating whether the mode is LiveAnything or PureLive.
+        /// </summary>
+        public static bool IsLive(this ModelsMode modelsMode)
+        {
+            return
+                modelsMode == ModelsMode.PureLive
+                || modelsMode == ModelsMode.LiveAppData;
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the mode is LiveAnything but not PureLive.
+        /// </summary>
+        public static bool IsLiveNotPure(this ModelsMode modelsMode)
+        {
+            return
+                modelsMode == ModelsMode.LiveAppData;
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the mode supports explicit generation (as opposed to pure live).
+        /// </summary>
+        public static bool SupportsExplicitGeneration(this ModelsMode modelsMode)
+        {
+            return 
+               modelsMode == ModelsMode.AppData
+               || modelsMode == ModelsMode.LiveAppData;
+        }
+    }
+}