Revert "Interfaces->Abstractions"

This reverts commit 80b66cfde3.

DiagnosticsPages.sln

@@ -38,7 +38,7 @@ Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Microsoft.AspNet.Diagnostic
 EndProject
 Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "StatusCodePagesSample", "samples\StatusCodePagesSample\StatusCodePagesSample.xproj", "{CC1F5841-FE10-4DDB-8477-C4DE92BA759F}"
 EndProject
-Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Microsoft.AspNet.Diagnostics.Abstractions", "src\Microsoft.AspNet.Diagnostics.Abstractions\Microsoft.AspNet.Diagnostics.Abstractions.xproj", "{83FFB65A-97B1-45AA-BCB8-3F43966BC8A3}"
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Microsoft.AspNet.Diagnostics.Interfaces", "src\Microsoft.AspNet.Diagnostics.Interfaces\Microsoft.AspNet.Diagnostics.Interfaces.xproj", "{83FFB65A-97B1-45AA-BCB8-3F43966BC8A3}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

src/Microsoft.AspNet.Diagnostics.Interfaces/project.json

@@ -1,6 +1,6 @@
 {
 	"version": "1.0.0-*",
-	"description": "ASP.NET 5 diagnostics middleware abstractions.",
+	"description": "ASP.NET 5 diagnostics middleware interfaces.",
 	"compilationOptions": { "warningsAsErrors": true },
 	 "frameworks": {
         "dnx451": { },

src/Microsoft.AspNet.Diagnostics/project.json

@@ -2,7 +2,7 @@
     "version": "1.0.0-*",
     "description": "ASP.NET 5 Middleware for error handling, error pages, and diagnostics information.",
     "dependencies": {
-        "Microsoft.AspNet.Diagnostics.Abstractions": "1.0.0-*",
+        "Microsoft.AspNet.Diagnostics.Interfaces": "1.0.0-*",
         "Microsoft.AspNet.Http.Extensions": "1.0.0-*",
         "Microsoft.AspNet.WebUtilities": "1.0.0-*",
         "Microsoft.Framework.OptionsModel": "1.0.0-*",