Styling tweaks

Closes #37 

Made some UI/UX improvements per @	isaackeyet:

1. Removed the "Visitors and Views" heading on the top of the table
1. Allow numbers to shrink to fit in the cells that display large counts
1. Removed the subheading "Content" in Followers & Shared section
1. Made the column heading under Referrers singular (Referrer instead of Referrers)