Changes:
- Added SwaggerParameterKind.ModelBinding (for better Swashbuckle support)
- Changed default settings for SwaggerOwinSettings in Asp.NET Core (now correctly set by default)
- Removed unnecessary Owin dependency in NSwag.AssemblyLoader
- FileParameter is only rendered if needed (CS)
- Fixed major JsonExceptionConverterTemplate bug
- Added option to overwrite with relative URLs (use "." for that)