Just remove `_entityIdentity` and it still passes all tests
TODO: if this attempt incurs no other problems, then the T4 templates and sample apps must also be cleaned up
Added TrackableEntities.Common.nuspec for the CI build on MyGet.
Tokenized TrackableEntities.Common/TrackableEntities.Common.nuspec
Removed files element from TrackableEntities.Common.nuspec, to enable generation of symbols package.
Added TrackableEntities.Client.nuspec for CI build with MyGet.
Corrected dependency in TrackableEntities.Client.nuspec.
Added build.cmd file to Source directory.
Moved build.cmd to root.
Updated build.cmd to include output for package restore to a packaged directory under root.
Created nested build scripts. Included TrackableEntities.Client.
Added TrackableEntities.Client.Net4.cmd script. Re-organized build output folder structure.
Added TrackableEntities.EF.5.cmd. Created independent test build scripts.
Added TrackableEntities.EF.6 build script. Added ReadMe.txt to build scripts Debug folder.
Added TrackableEntities.Patterns.cmd build script.
Added build scripts for TrackableEntities.Patterns.EF.6.cmd.
BUG: TrackableExtensions.SetTracking at line 35. Must not set tracking on parent from child. For ex: Private change tracker of OrderDetail.Order must not be set.

Modified Order property on OrderDetail to include a ChangeTracker.
Modified test to fail: Existing_Parent_With_Children_Should_Have_Children_Marked.
Fixed BUG: TrackableExtensions.SetTracking must not set tracking on parent from child. For ex: Private change tracker of OrderDetail.Order must not be set
Merge branch 'custom-ref-tracker' of https://github.com/azabluda/TrackableEntitiesContrib into azabluda-custom-ref-tracker
Merge branch 'azabluda-custom-ref-tracker' into develop
Fixed TrackableExtensions.GetChanges() does not return modified Items if more than one ITrackable Members available.
Turns out, that hasLocalDownstreamChanges for Childs is overridden if more than one ITrackable members are available or modified ITrackable is not the last.
Only happens in the 1-1 and M-1 path.
Added Test and TestModelClass