Added swagger

Author: Jennifer Deigendesch

README.md

@@ -1,5 +1,6 @@
 # ASP.NET Core Example
-This is an example of an REST API with ASP.NET Core v1.0, which is made via following tutorials: 
+<h3>This is an example of a REST API with ASP.NET Core v1.0, which is made via following tutorials:</h3>
+
 Channel9: Creating REST API with ASP.NET Core (german): https://www.microsoft.com/germany/techwiese/know-how/video.aspx?id=msdn_de_67138
 Managing Static Files in ASP.NET Core: https://www.youtube.com/watch?v=n3rL0ekYEOM
 ASP.NET Web API Help Pages using Swagger: https://docs.microsoft.com/en-us/aspnet/core/tutorials/web-api-help-pages-using-swagger