Added sorting algorithms visualiser

.gitignore

public/coding_challenges/collisions/quad-tree/qtree.js

public/coding_challenges/collisions/quad-tree/sketch.js

...hallenges/collisions/test-every-optim/test-every-optim.js

public/coding_challenges/collisions/test-every/test-every.js

public/coding_challenges/index.html

public/coding_challenges/sorting-visualiser/algo.js

...g_challenges/sorting-visualiser/algorithms/bubble-sort.js

...ges/sorting-visualiser/algorithms/cocktail-shaker-sort.js

..._challenges/sorting-visualiser/algorithms/fisher-yates.js

...ng_challenges/sorting-visualiser/algorithms/quick-sort.js

public/coding_challenges/sorting-visualiser/index.html

public/coding_challenges/sorting-visualiser/main.js

public/coding_challenges/sorting-visualiser/sorter.html

public/coding_challenges/sorting-visualiser/visualiser.js

...c/coding_challenges/sorting-visualiser/visualisers/pie.js

...oding_challenges/sorting-visualiser/visualisers/spiral.js

...ing_challenges/sorting-visualiser/visualisers/standard.js

public/games/backgammon/game.html

public/games/backgammon/game.js