Problem: user wants to know the list of known streams
Problem: user wants to know the list of known streams

Solution: add lowlevel-api + test

lnls-dig/malamute,opedroso/malamute,zeromq/malamute,lnls-dig/malamute,lnls-dig/malamute,zeromq/malamute,vyskocilm/malamute-core,karolhrdina/malamute,opedroso/malamute,malanka/malamute,vyskocilm/malamute-core,vyskocilm/malamute-core,vyskocilm/malamute-core,malanka/malamute,zeromq/malamute,vyskocilm/malamute-core,lnls-dig/malamute,karolhrdina/malamute,opedroso/malamute,opedroso/malamute,malanka/malamute,zeromq/malamute,lnls-dig/malamute,vyskocilm/malamute-core,karolhrdina/malamute,karolhrdina/malamute,karolhrdina/malamute,lnls-dig/malamute,karolhrdina/malamute,opedroso/malamute,zeromq/malamute,malanka/malamute,vyskocilm/malamute-core,malanka/malamute,zeromq/malamute,malanka/malamute,zeromq/malamute,opedroso/malamute,opedroso/malamute,malanka/malamute,karolhrdina/malamute,lnls-dig/malamute