Bradsc frontend optimization

[BradsherC]

• improved load times:
  • removed redundant & repetitive styling
  • combined styling used by multiple pages and separated styling used by only some pages
  • combined JS used by multiple pages and separated JS used by only some pages
  • instead of linking to JS and stylesheets used by single pages, put minified versions of them in those pages' headers
• improved accessibility by increasing the contrast of some text
• did not change image formats, since that increased load times in testing

Further increases in performance are possible by explicitly sizing images, but they would be marginal.