Implemented tabbed dog browsing
Implemented corgi carousel (very wow, no tearing)
Finished corgi thumbnails
Implemented focus box in zoomable
Minor changes
Add 'week6/day4/' from commit 'aa882dce442d9ddba18a867a95b8f0927b7a3bb5'

git-subtree-dir: week6/day4
git-subtree-mainline: 709bcc78e1e9b7292b2642b215307506c089861b
git-subtree-split: aa882dce442d9ddba18a867a95b8f0927b7a3bb5
Partner attribution