Merge pull request #3 from NTCoding/master

changed to in-memory tests so all tests pass by default
Merge pull request #4 from NTCoding/master

entities updates
Merge pull request #5 from NTCoding/master

moved each version of domain events into own separate project
Merge pull request #6 from NTCoding/master

changes
Added solution folders to group bounded contexts.
renmaed item id to listing id on auction