Updates to include returning the next step in sequence

src/Umbraco.Web/Install/Models/InstallProgressResultModel.cs

@@ -0,0 +1,42 @@
+using System.Runtime.Serialization;
+
+namespace Umbraco.Web.Install.Models
+{
+
+    /// <summary>
+    /// Returned to the UI for each installation step that is completed
+    /// </summary>
+    [DataContract(Name = "result", Namespace = "")]
+    public class InstallProgressResultModel
+    {
+        public InstallProgressResultModel(bool processComplete, string stepCompleted, string nextStep, string view = null, object viewModel = null)
+        {
+            ProcessComplete = processComplete;
+            StepCompleted = stepCompleted;
+            NextStep = nextStep;
+            ViewModel = viewModel;
+            View = view;
+        }
+
+        /// <summary>
+        /// The UI view to show when this step executes, by default no views are shown for the completion of a step unless explicitly specified.
+        /// </summary>
+        [DataMember(Name = "view")]
+        public string View { get; private set; }
+
+        [DataMember(Name = "complete")]
+        public bool ProcessComplete { get; set; }
+
+        [DataMember(Name = "stepCompleted")]
+        public string StepCompleted { get; set; }
+
+        [DataMember(Name = "nextStep")]
+        public string NextStep { get; set; }
+
+        /// <summary>
+        /// The view model to return to the UI if this step is returning a view (optional)
+        /// </summary>
+        [DataMember(Name = "model")]
+        public object ViewModel { get; private set; }
+    }
+}

src/Umbraco.Web/Install/Models/InstallSetupResult.cs

@@ -2,11 +2,13 @@ using System.Collections.Generic;
 
 namespace Umbraco.Web.Install.Models
 {
+    /// <summary>
+    /// The object returned from each installation step
+    /// </summary>
     public class InstallSetupResult
     {
         public InstallSetupResult()
-        {
-            
+        {            
         }
 
         public InstallSetupResult(IDictionary<string, object> savedStepData, string view, object viewModel = null)