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The check needed knowledge of the _listen_ addresses,
not just the interface addresses. Also, the handshake now
sends out all the addresses we accumulate about ourselves.
(this may be bad in the long run, but useful now to test)

- distinguish log.Error and log.Errorf functions
- Initialize structs with field names
- A bit of unreachable code (defers)

Changed lots of peer use, and changed the peerstore to ensure
there is only ever one peer in use.

Fixed #174

![](http://m.memegen.com/77n7dk.jpg)

need to switch away from timing tests. its very annoying.
Should use proper go sync, as in
https://www.youtube.com/watch?v=ndmB0bj7eyw

for some reason travis has more goroutines running by def.