Grandcentral Routing (temporary while DHT is shown to be correct)

add automatic add and cat for debugging purposes

retry cats

cast string

argh! @whyrusleepgin

use mock repo to avoid clashing

larger files for more variety FIXUP into gc-client

fix: change in both places FIXUP gc-client

 fix(gc-client) start with size 1 (unit)

fix(gc-client) start at 1 FIXUP prev

gc-client rm comment

gc-client larger files

fix(gc-client) cat the data out to dev null to ensure entire file is fetched

perf(gc-client) use io.Pipe to handle io transfer

fixup

fix

Note: the dht-specific part of the bootstrap function
was only there to make sure to call `dht.Update(ctx, npeer)`.
This already happens on all new connections made by the
network, as the dht is signed up for notifications.

validate doesn't work. the peer's public key is not present in the
peerstore.

this functionality is here as an optimization