moved the http server to common, added more http handlers

MediaBrowser.Common/Net/StreamExtensions.cs

@@ -0,0 +1,19 @@
+using System;
+using System.IO;
+using System.Reactive.Linq;
+
+namespace MediaBrowser.Common.Net
+{
+    public static class StreamExtensions
+    {
+        public static IObservable<byte[]> ReadBytes(this Stream stream, int count)
+        {
+            var buffer = new byte[count];
+            return Observable.FromAsyncPattern((cb, state) => stream.BeginRead(buffer, 0, count, cb, state), ar =>
+            {
+                stream.EndRead(ar);
+                return buffer;
+            })();
+        }
+    }
+}