dht query command

Miscellaneous Changes

ipfswatch

Add Bootstrap Peers: Mercury, Earth, Venus, Jupiter

Webui Commands

fixing fd leaks

add periodic bootstrapping

Many times, a node will start up only to shut down immediately.
In these cases, reproviding is costly to both the node, and the
rest of the network. Also note: the probability of a node being
up another minute increases with uptime.

TODO: maybe this should be 5 * time.Minute

Moved it to its own package to isolate scope.

s/kademlia calls for makign sure to query all peers we
have in our routing table, not just those closest. this
helps ensure most queries resolve properly.

When some queries finished, but we got no result, it should
be a simple NotFoundError. Only when every single query ended
in error do we externalize those to the client, in case
something major is going wrong