Gets lots of the new installer logic working

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

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.Serialization;
+using Umbraco.Core;
+
+namespace Umbraco.Web.Install.Models
+{
+    /// <summary>
+    /// Model to give to the front-end to collect the information for each step
+    /// </summary>
+    [DataContract(Name = "step", Namespace = "")]
+    public abstract class InstallSetupStep<T> : InstallSetupStep
+    {
+        /// <summary>
+        /// Defines the step model type on the server side so we can bind it
+        /// </summary>
+        [IgnoreDataMember]
+        public override Type StepType
+        {
+            get { return typeof(T); }
+        }
+
+        public abstract IDictionary<string, object> Execute(T model);
+
+        [IgnoreDataMember]
+        public bool HasUIElement
+        {
+            get { return View.IsNullOrWhiteSpace() == false; }
+        }
+        //[IgnoreDataMember]
+        //public Func<T, IDictionary<string, object>> ExecuteCallback { get; set; }
+    }
+
+    [DataContract(Name = "step", Namespace = "")]
+    public abstract class InstallSetupStep
+    {
+        [DataMember(Name = "name")]
+        public string Name { get; set; }
+
+        [DataMember(Name = "view")]
+        public abstract string View { get; }
+
+        /// <summary>
+        /// Defines what order this step needs to execute on the server side since the 
+        /// steps might be shown out of order on the front-end
+        /// </summary>
+        [IgnoreDataMember]
+        public int ServerOrder { get; set; }
+
+        /// <summary>
+        /// Defines the step model type on the server side so we can bind it
+        /// </summary>
+        [IgnoreDataMember]
+        public abstract Type StepType { get; }
+
+    }
+}