Found a few small JS bugs related to data returned from the API that I fixed, plus an inconsistency in HTML I fixed.

1. Searching may return less than 4 items, but the length of the collection was hardcoded, making the search results inaccessible if the search returned less than 4 items (search for "calvin har" in the current version to see this).
2. If the user didn't have a description, followers wouldn't show up either because we assumed data.description would exist. Simple null check.
3. Followers/following pages didn't have a link to the user if you clicked on the name of the user rather than the photo (despite the pointer cursor). So I added a link.