[evol] Botnet: propagate API calls environment (user token and language prefs at the moment), propagate session a bit further too in order to implement a more dynamic API tree
[fix/evol] work on better Interface/Task/Conversation/… sync and bot stop action in order to avoid races and locks
[evol] Protocol: allow returning multiple errors
[licence] updated copyright years
[evol] Protocol/DSL: implemented node existence check
[evol] BotnetTask DSL: now that we have one Task per task, close conversation thread as soon as the task is finished
[layout] reorganization