Plugin Base WebViewPage #22 & Authorization #24

Plugins have a base WebViewPage to inherit, this offers integration with
various Disco services. Plugins can also add Authorization attributes to
their Web Handlers and Controller Methods.

Disco.Services/Plugins/PluginWebViewPage.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Disco.Services.Plugins
+{
+    public abstract class PluginWebViewPage<T> : Disco.Services.Web.WebViewPage<T>
+    {
+        public WebHelper<T> Plugin { get; private set; }
+
+        public PluginWebViewPage()
+        {
+            var self = this.GetType();
+            var manifest = Plugins.GetPlugin(self.Assembly);
+
+            this.Plugin = new WebHelper<T>(this, manifest);
+        }
+    }
+}