Changes profiler over to use a resolver and uses an interface for it. Changes core over to use a

LogProfiler and the web project to use a web profiler (MiniProfiler). Fixes medium trust implementation,
adds performance check for binding to begin request, changes Web profiler over to be decoupled from the
umbraco application objects (binds to events by itself)

src/Umbraco.Web/WebBootManager.cs

@@ -11,6 +11,7 @@ using Umbraco.Core.Dictionary;
 using Umbraco.Core.Dynamics;
 using Umbraco.Core.Logging;
 using Umbraco.Core.ObjectResolution;
+using Umbraco.Core.Profiling;
 using Umbraco.Core.PropertyEditors;
 using Umbraco.Core.Sync;
 using Umbraco.Web.Dictionary;
@@ -235,6 +236,9 @@ namespace Umbraco.Web
         {
             base.InitializeResolvers();
 
+            //Set the profiler to be the web profiler
+            ProfilerResolver.Current.SetProfiler(new WebProfiler(UmbracoApplication));
+
             //set the default RenderMvcController
             DefaultRenderMvcControllerResolver.Current = new DefaultRenderMvcControllerResolver(typeof(RenderMvcController));