[Autofac]
- Introducing new inferfaces IContainerProvider, ISharePointContainerProvider and ILifetimeScopeProvider to help organize the SharePoint bootstrapping utils in a way more consistent with the official Autofac.Integration.Web and Autofac.Integration.Mvc.
- Began work on per-HTTP-request scopes and reworked the SPSite and SPWeb-bound scoping logic (see SPNoDisposalLifetimeScopeHelper for their implementation)