Added the ability to automate any c# scripts for an upgrade process. I realize this is superceded already in 6.0

but we need a way to do this in 4.x too especially for this release since we need to run a script to fix some db
issues. I've added a framework using an UpgradeScriptManager and another install step + unit tests for some of the
UpgradeScriptManager methods.

src/Umbraco.Web.UI/install/steps/UpgradeScripts.ascx.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+using System.Web.UI;
+using System.Web.UI.WebControls;
+using Umbraco.Core.Configuration;
+using umbraco.presentation.install;
+using Umbraco.Web.Install.UpgradeScripts;
+
+namespace Umbraco.Web.UI.Install.Steps
+{
+    public partial class UpgradeScripts : System.Web.UI.UserControl
+    {
+        protected void Page_Load(object sender, EventArgs e)
+        {
+
+        }
+
+        protected void RunScripts(object sender, EventArgs e)
+        {
+            //run the scripts and then go to the next step
+            UpgradeScriptManager.ExecuteScriptsForVersion(GlobalSettings.GetConfigurationVersion());
+            
+            Helper.RedirectToNextStep(Page);
+        }
+    }
+}

src/Umbraco.Web.UI/install/steps/UpgradeScripts.ascx.designer.cs

@@ -0,0 +1,24 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated. 
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Umbraco.Web.UI.Install.Steps {
+    
+    
+    public partial class UpgradeScripts {
+        
+        /// <summary>
+        /// btnNext control.
+        /// </summary>
+        /// <remarks>
+        /// Auto-generated field.
+        /// To modify move field declaration from designer file to code-behind file.
+        /// </remarks>
+        protected global::System.Web.UI.WebControls.LinkButton btnNext;
+    }
+}