Move IServiceCollection extension to Microsoft.Framework.DependencyInjection namespace

Fixes: https://github.com/aspnet/Diagnostics/issues/96

src/Microsoft.AspNet.Diagnostics.Elm/ElmExtensions.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
-using System;
 using Jetbrains.Annotations;
 using Microsoft.AspNet.Diagnostics.Elm;
 using Microsoft.Framework.DependencyInjection;
@@ -33,14 +32,5 @@ namespace Microsoft.AspNet.Builder
         {
             return builder.UseMiddleware<ElmPageMiddleware>();
         }
-
-       /// <summary>
-       /// Registers an <see cref="ElmStore"/> and configures <see cref="ElmOptions"/>.
-       /// </summary>
-        public static IServiceCollection AddElm([NotNull] this IServiceCollection services, Action<ElmOptions> configureOptions = null)
-        {
-            services.AddSingleton<ElmStore>(); // registering the service so it can be injected into constructors
-            return services.Configure(configureOptions ?? (o => { }));
-        }
     }
 }

src/Microsoft.AspNet.Diagnostics.Elm/ElmServiceCollectionExtensions.cs

@@ -0,0 +1,35 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using Jetbrains.Annotations;
+using Microsoft.AspNet.Diagnostics.Elm;
+
+namespace Microsoft.Framework.DependencyInjection
+{
+    public static class ElmServiceCollectionExtensions
+    {
+        /// <summary>
+        /// Registers an <see cref="ElmStore"/> and configures <see cref="ElmOptions"/>.
+        /// </summary>
+        public static IServiceCollection AddElm([NotNull] this IServiceCollection services)
+        {
+            return services.AddElm(configureOptions: null);
+        }
+
+        /// <summary>
+        /// Registers an <see cref="ElmStore"/> and configures <see cref="ElmOptions"/>.
+        /// </summary>
+        public static IServiceCollection AddElm([NotNull] this IServiceCollection services, Action<ElmOptions> configureOptions)
+        {
+            services.AddSingleton<ElmStore>(); // registering the service so it can be injected into constructors
+
+            if (configureOptions != null)
+            {
+                services.Configure(configureOptions);
+            }
+
+            return services;
+        }
+    }
+}

test/Microsoft.AspNet.Diagnostics.Tests/ElmLoggerTest.cs

@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;