Lighten background slightly

From #efefee to #f3f3f3
Nat'l Heat Chart - Line width and color tweaks

Wasn’t sure about the red selector. Chose a darker charcoal. What do
you think?!
Also added in a bit more space for the region labels.
City Donut Chart - Color & line width tweaks

Updated to match nat’l heat chart
Merge pull request #1 from jessicamcinchak/master

final text update
Merge pull request #2 from jessicamcinchak/master

update pinwheel tooltip text
Update of Heat Map labels in the CSS Style
Merge pull request #3 from jessicamcinchak/master

update partners text
Small UI Tweaks and added refresh functions