rate model. Create a loader to refresh response rates for all
subcategories.
Use precalculated response rates in views
Wrap more elements in page caching
Calculate a response rate for a subcategory if one does not already
exist
Implement large speed improvements to score calculations. Add page caching to all pages. Small speed improvements to response rate by filtering out
survey items without responses with `none?` `method vs count == 0`.
rebuilt