add failing test
extract changing entity type from EntityContext
loosen read-only rule
extract entity change tracker
back to entity store managing changes
fix context factory constructor
only one entity store (reuse from context)
fix automerge
fix this
fix context tests
changes tracker and conversion split
refactored some composition and added required components
more refactoring
fix dictionary problem
first optimizer tests
namespace clash
merging graph changes
setting entity types
implementing sparql command factory
minor fixes