New Lesson: TSDB for network monitoring

[Mierdin]

This is a new lesson that introduces time-series databases as a concept, specifically using parts of the TICK stack (Telegraf, influxdb) as well as grafana for visualization if I can swing it.

I'm thinking the topology will be:

linux1 ----------- vqfx1 ----------linux2

I can set up iperf or something on both of the linux nodes to run traffic through the vqfx and that's how we'll get more interesting metrics.

In terms of stages, this is what I am imagining, though this is just off-the-cuff and subject to change:

stages:  #WIP
  - id: 1
    description: Ingesting Network Data with Telegraf
  - id: 2
    description: Working with the influxdb client to make queries
  - id: 3
    description: Visualizing data with grafana

Closes #284

[Mierdin]

I am going to stop work on this to let others take it up if desired. This PR isn't compatible with the latest version of Antidote anyways.