Added PluginManager extensions
Main work on GatewayProviderResolution - this is broken at this point.  Checking in to work on at home.
More work on the resolver refactoring.  Unit tests breaking on ExamineManager.Instance
More refactoring of resolvers.  Issues remain with the test refactoring now that there are so many singletons in play.
Finished refactoring the GatewayProviderResolver and patched up unit tests.
Merge remote-tracking branch 'merchello/1.1.0' into 1.1.0
Merge pull request #581 from rustyswayne/1.1.0

Resolver refactoring
Merge commit 'fetch_head' into ShippingProvider
Fixed bug with not passing the shipping country in