next version notes

[okdistribute]

• connect to swarm and sparse download metadata

• it shouldn't matter if i have the hypercore synced partially or not

• if given the hyperdiscovery instance it could have more info

• try to download a block

• downloading the first block which is the type identifier

• static method that checks the key

• most of the others should have the hypercore instance

• see if the dns-sd server is down

• listen to 'warn' 'error' 'peer' from discovery-channel https://github.com/maxogden/discovery-channel/blob/master/index.js#L22-L24