This PR disables color output when the STDOUT is not a TTY. This makes
running commands under `watch` or other commands nicer.

Clean up docker mounts

Clarify deployment api docs

Fix typo Automtic -> Automatic

Autocomplete arguments for remaining commands

Add the Nomad agent version to the node-status CLI output.

build: Replace shell scripts with GNUmakefile

Placing allocs counts towards placement limit

Add deployments to search api

add docs for mount

This PR makes placing new allocations count towards the limit. We do not
restrict how many new placements are made by the limit but we still
count towards the limit. This has the nice affect that if you have a
group with count = 5 and max_parallel = 1 but only 3 allocs exist for it
and a change is made, you will create 2 more at the new version but not
destroy one, taking you down to two running as you would have
previously.

Fixes https://github.com/hashicorp/nomad/issues/3053

Minor doc updates

Update gopsutil to stop calling SetEnv