Revert "nsqd: healthy flag"

This reverts commit babf8ea3b68d7e75704073395b72c3f648c33409.
bump v0.2.30 stable
Revert "Revert "nsqd: healthy flag""

This reverts commit 49dedf5495721949d2a29751146850b465f4ee36.
nsqd: IDENTIFY should respond with materialized msg_timeout
Merge pull request #428 from mreiferson/fix_msg_timeout_428

nsqd: msg_timeout for clients pre 0.2.28
nsqd: error if worker-id out of range (update help text)
Merge pull request #429 from mreiferson/worker_id_429

nsqd: --worker-id issues
Create Dockerfiles.

Create a base Dockerfile that builds nsq and all its subdirectories.

Create a Dockerfile for nsqd that inherits the base and will run nsqd
with the passed command line flags.

Create a Dockerfile for nsqlookupd that inherits the base and will run
nsqlookupd with the passed command line flags.

Create a Dockerfile for nsqadmin that inherits the base and will run
nsqadmin with the passed command line flags.
Merge pull request #412 from secondbit/paddy_dockerfiles

create first pass Dockerfile(s)
nsqd: fix/add diskqueue benchmarks
nsqadmin: pluggable logging
nsqd: pluggable logging
util: pluggable logging
nsqlookupd: pluggable logging
nsqd: improved test logging
test: don't run with -v
nsqd: remove assert test dependency
deps: bump go-snappystream to v0.2.0
nsqd: explicitly clean up test connections

this ensures that the connections are referenced until the end
of each test function execution, to prevent a pre-emptive GC
from cleaning up and closing a connection underneath.
deps: remove assert/pretty/text