Add Activity model
Fix #47
Bump version
Add id and transaction_id
Messages to imperative
Add activity class creation
Add before_create_transaction template method
Add test for activity
Add new plugin architecture
Refactor plugins
Renew UnitOfWork process
Remove print
Improve plugin architecture
Fix tx meta handling
Refactor UOW
Fixed exotic operations handling
Fix python3 compatibility
Update SA-Utils requirement
Fix ActivityPlugin
Move extensions to plugins