Add labs/lab3-k-means

labs/lab3-k-means/README.md

labs/lab3-k-means/clusters.png

labs/lab3-k-means/clusters.svg

labs/lab3-k-means/points.png

labs/lab3-k-means/points.svg

labs/lab3-k-means/start.png

labs/lab3-k-means/step0.png

labs/lab3-k-means/step0.svg

labs/lab3-k-means/step1.png

labs/lab3-k-means/step1.svg

labs/lab3-k-means/step2.png

labs/lab3-k-means/step2.svg

labs/lab3-k-means/step3.png

labs/lab3-k-means/step3.svg

labs/lab3-k-means/step4.png

labs/lab3-k-means/step4.svg

labs/lab3-k-means/uniform-random-30steps.png