Setup Loggers

[directionless]

This PR is an attempt at setting up logging. The goal is to create something like:

flowchart LR
    subgraph inputs
        direction TB
        systemLogger>systemLogger]
        logger>logger]

        %% Force formatting
        systemLogger ~~~ logger
    end

    subgraph destinations
        direction TB
        destSys[(System Log Store)]
        destDebugLog[(debug.json)]
        destMem[(inmemory ring)]
        destStore[(persisted ring)]
    end

    systemLogger --> slTee{tee} --> logger
    slTee --> slFilter[[filter out debug]] --> destSys

    %% force formatting
    logger ~~~ slTee ~~~ systemLogger

    logger --> lTee{tee}
    lTee{tee} --> destDebugLog
    lTee --> destMem
    lTee --> f2[[filter: info higher]] --> destStore

    osquery -. kolide_launcher_logs .-> destMem
    osquery -. kolide_launcher_crit_logs .-> destStore

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To achieve that, this PR adds:

1. a simple ring buffer, backed by a store
2. building on that, it creates a ringlogger
3. a log thicket, which uses these to create that routing.

TODO:

• replace the logger in main
• setup osquery table access

[James-Pickett]

This looks pretty good, only one tiny nit. Nice work! Very well thought out.

[directionless]

Replaced by #1322