Adding Autofac as an external container and to use it for DI. Relates to #303
Removed un-necessary needed for DI, since we are using Autofac directly. Relates to #303
For Asp.Net MVC endpoints, if its not a send only endpoint, the generated code will initialize to purge the queue on startup.  Related to #303
Merge pull request #308 from Particular/issue-303

WIP - Adding Autofac as an external container and to use it for DI in ASP.NET MVC endpoint.