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.