Merge pull request #79 from muffinresearch/new-details-page-design

Details page (bug 860384)
remove "Description" heading on desktop
Fixed cache rewriting to send format=json to API
Fix for double-escaped content pages (bug 866312)
Pass null region when region is not available
Make the hover target for the gear menu bigger
redesigned homepage and category browse pages - mobile & desktop (bug 860392)
fix page height and background-color on mobile
Category dropdown WiP (bugs 860402, 858701)