Updating dev NuGet.config
Fixup references
Missing period
Add support for named options

Also rename IOptionsSetup -> IOptionsAction
SetupOptions -> ConfigureOptions
AddSetup -> AddOptionsAction
Delete renamed file left behind
Reacting to DependencyInjection changes
Reacting to CLR package versioning changes
Removing version from framework assemblies node
Rename IOptionsAccessor and IOptionsAction
Remove portable framework assemblies from nupkg dependencies
Revert "Remove portable framework assemblies from nupkg dependencies"

This reverts commit a54d451c60fdbedf035a14db59bb36e01830c77e.