Add embedding plot #253

Job	Run time
run-benchmark (nlp)	1m 38s
run-benchmark (file-enc)	1m 35s
run-benchmark (unix50)	3m 30s
run-benchmark (log-analysis)	4m 50s
run-benchmark (max-temp)	28m 21s
run-benchmark (uniq-ips)	9s
run-benchmark (media-conv)	4m 18s
run-benchmark (sklearn)	2m 7s
run-benchmark (covid-mts)	52s
run-benchmark (riker)	6m 14s
run-benchmark (oneliners)	33s
run-benchmark (web-index)	53s
run-benchmark (vps-audit)	2m 4s
run-benchmark (vps-audit-negate)	3m 46s
run-benchmark (makeself)	35s
	1h 1m 25s

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