aka What If structs.go Wasn't So Big?

Initial Node drain docs

Check for nil for RPC listener; prevent double closing of listener channel 

cli: remove info color on monitored output

drain: add timestamps to cli output

Generic handling of server region errors

test: don't rely on alloc runner update count

Fix issue where force deadlines weren't respected

Also toggle eligibility output based on value

We were incorrectly relying on the count of alloc updates in a number of
tests. Since alloc updates are async, their number is non-determinstic
and largely meaningless.

This should fix quite a few flaky tests in Travis and prevent future
mistaken assumptions in tests.