Connect and listen to BOLT compatible nodes

[Varunram]

The connection will be short-lived (15s), but the log statements would let you verify that you're connected. Start lnd, use getinfo and try connecting to lit's pubkey (available in lit's log).

EDIT: Rebased on current master, contains #434 and #435 within it (squashed and rebased, refer #436 for list of commits)

[delbonis]

Should those other PRs be closed now?

[Varunram]

retest this please

[Varunram]

Closed other PRs, squashed the commits in this one.