implemented rebuilding only changed projections
refactored read model rebuilder, added comments
Merge branch 'feature/track_and_rebuild_changed_projections' into develop
Changed messages serializer to JSonDataContractSerializer

Merge branch 'develop' of https://github.com/AlexSugak/EComWithCQRS into feature/Fixing-events-generator-NRE

Conflicts:
	ECom.Infrustructure/ECom.Infrastructure.csproj