* Add plugin option for protogen in Makefile
* Fix the generator for the plugin in util/protogen
* Erase convertable types, move helpful methods to gRPC protobufs
* Erase helpers for convertations
* Generate StableMarshlal/StableSize for protobufs by the protoc plugin
Signed-off-by: Airat Arifullin a.arifullin@yadro.com
Support:
* new status codes (object, container, session);
* object `Lock` message;
* different signature schemes.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
