Plot additional values on miner TTFB chart

[pyropy]

One thing we could think of is when viewing the ttfb for a particular miner we gain little information on what that data means other than how it is computed (Median of all ttfb values). I think the relationship between a single miners ttfb to all miners ttfb is what really matters here.
We could for example also plot the overall ttfb curve on the same chart that show each individual miner's ttfb. Also, we could create a boxplot chart of all accumulated ttfbs and show were in the distribution a particular miner currently resides in.

Originally posted by @NikolasHaimerl in #14 (review)