Feature #67: Advanced document template events

OnGenerated and OnImportAttachment allow advanced users to enter
expressions which will be evaluated whenever these document
template/importing events are triggered. This enables greater
automation.

Disco.Data/Migrations/201407260624238_DBv16.Designer.cs

@@ -0,0 +1,27 @@
+// <auto-generated />
+namespace Disco.Data.Migrations
+{
+    using System.Data.Entity.Migrations;
+    using System.Data.Entity.Migrations.Infrastructure;
+    using System.Resources;
+    
+    public sealed partial class DBv16 : IMigrationMetadata
+    {
+        private readonly ResourceManager Resources = new ResourceManager(typeof(DBv16));
+        
+        string IMigrationMetadata.Id
+        {
+            get { return "201407260624238_DBv16"; }
+        }
+        
+        string IMigrationMetadata.Source
+        {
+            get { return null; }
+        }
+        
+        string IMigrationMetadata.Target
+        {
+            get { return Resources.GetString("Target"); }
+        }
+    }
+}

Disco.Data/Migrations/201407260624238_DBv16.cs

@@ -0,0 +1,22 @@
+namespace Disco.Data.Migrations
+{
+    using System;
+    using System.Data.Entity.Migrations;
+    
+    public partial class DBv16 : DbMigration
+    {
+        public override void Up()
+        {
+            AddColumn("dbo.DocumentTemplates", "OnGenerateExpression", c => c.String());
+            AddColumn("dbo.DocumentTemplates", "OnImportAttachmentExpression", c => c.String());
+            AlterColumn("dbo.DocumentTemplates", "FilterExpression", c => c.String());
+        }
+        
+        public override void Down()
+        {
+            AlterColumn("dbo.DocumentTemplates", "FilterExpression", c => c.String(maxLength: 250));
+            DropColumn("dbo.DocumentTemplates", "OnImportAttachmentExpression");
+            DropColumn("dbo.DocumentTemplates", "OnGenerateExpression");
+        }
+    }
+}