TypeActivator fallback to default values

Fixes https://github.com/aspnet/DependencyInjection/issues/125
Updating to release NuGet.config
Merge branch 'release' into dev
Updating to release NuGet.config
Merge branch 'release' into dev
Prototype override/default mode for services
Stuff
Move tests to all container and fix tests
Call GetService in a scope
Cleanup