Adding proper descriptions in readme.md files for functional tests.

test/WebSites/ActionResultsWebSite/wwwroot/readme.md

@@ -0,0 +1,4 @@
+ActionResultsWebSite
+===
+
+This web site illustrates how to use out of box action results which are provided as methods on the controller class.

test/WebSites/ErrorPageMiddlewareWebSite/wwwroot/README.md

@@ -0,0 +1,4 @@
+ErrorPageMiddlewareWebSite
+===
+
+This web site illustrates how to register error page middleware.

test/WebSites/LoggingWebSite/wwwroot/readme.md

@@ -1 +1,4 @@
-This file exists as Git does not allow to add empty directories into the repo
+LoggingWebSite
+===
+
+This web site illustrates how to register and configure `Elm` logger.

test/WebSites/RazorViewEngineOptionsWebsite/wwwroot/readme.md

@@ -1 +1,4 @@
-Functional test for usage of RazorViewEngineOptions.FileSystem
+RazorViewEngineOptionsWebSite
+===
+
+This web site illustrates use cases for `RazorViewEngineOptions.FileSystem`.