slightly better debug logging
modulize class, add `reload()` method
add `db::class.property` 'namespace'
attempt to consume the next payload on unsupported status
fix doc inconsistencies
add property rename()
add support for `mandatory`
add support for creating multiple properties together
better error handling in case of protocol error
add support for adding property configuration at creation time
add support for not null
fix error handler
avoid an update where possible
add draft  migration system