app/styles/_sm.scss: fix breadcrumb alignment
Shop Category: Tweak product widths

- 4 products in a row when browser size is 1550px - 1900px
- 5 products in a row when browser size is greater than 1900px
Slideout Cart: Change background color

Substituted a solid color for the blue pattern to ease readability
app/views/healthy_living.html: Edit navigation

From conversation starting Dec. 10

https://basecamp.com/2690730/projects/6465667/messages/34696477#comment_230589520