Update README.md
Use a higher level ItemManager.CopyItem() instead of ItemManager.Provider.

Sitecore 8 changed the signature of ItemManager.Provider property and it
causes a runtime exception if compiled against earlier versions of
Sitecore.
Merge pull request #31 from pveller/master

Use a higher level ItemManager.CopyItem() instead of ItemManager.Provider
Added blobs sample
Updated Content Search example
Exclude readme from the nuget package
Added HowToSetUserIsAdministrator and HotToSetUserProfile samples
Started branches
Created Integration Tests project