Added note/link to Vagrant installation instructions

So I spent an hour or more trying to figure out why Docker did not install, turns out installing vagrant from the Linux distribution is a stupid idea.

So hopefully a link will help prevent other people running into this problem.

Fix the shuffling of remote datacenters

Pointed out by: @dadgar

Pointed out by: @ryanuber

Handle max plans evaluation in generic scheduler

Not emitting per-pid stats and added the total ticks consumed by a Task

Make line copy to avoid being overriden by subsequent scans

Guard against NaN in disk stats

finer grain locking on LatestAllocStats

Fixed a typo

Guard against bad restore in alloc runner

Update gopsutils

F fingerprint cpus

Create and pass only one `logger` object around per Agent

Teach config.ConsulConfig how to construct a consulapi TLS client.

Assume all cores are the same speed.