Fix EF Delete error when entity pulled from cache

Fixes #104

Needed to make sure that the entity was attached to the DbContext so
that it can be removed.  Otherwise the exception is thrown that the
object is not in the ObjectStateManager.

Added spike integration tests to replicate the error and verify the fix
worked.
Merged AOP branch

This brings in aspects on entities that hook into the lifecycle of a
repository as well as azure table and azure blob repositories (still in
beta)
Removed project lines added by mistake
Having issues with build server solution file

Testing removing the first blank line
Added EndProject that was missing from logging project
Remove azure spike tests
Logging nuspec file