* First set of fixes to support ver 3.0, useswashbuckle does not work yet
* Fix swashbuckle issues iwth aspnetcore 3.0
* Use default routing for 2.2 and turn off default for 3.0
* fix up documentation
* PR Feedback and wrong name in mustache file
* Fix for 2.1 usage too
* Change isFramework to useFrameworkReference as name to make thngs explicitly clear. Also fix small messages for the review comments
* Make JSON.NET version configurable
* Activate endpoint routing and use camel case NamingStrategy
* Make Newtonsoft version configurable to match ASP.NET Core preview 5
* Fix spelling of an option, remove a duplicate call and update docs