Make navigation div go on top of club news in narrow layout.
Requires flex layout on the front page and css isolation
   calpoly/frontend/assets.py: Remove CSS pages pages folder from bundle
   calpoly/frontend/static/css/pages/index.css: Use flexboxes for front page layout
   calpoly/frontend/static/js/pages/index.js: Make event links have h4 styling
   calpoly/frontend/templates/get_involved.html,
   calpoly/frontend/templates/index.html,
   calpoly/frontend/templates/parts.html,
   calpoly/frontend/templates/parts_location.html,
   calpoly/frontend/templates/posts/edit.html,
   calpoly/frontend/templates/projects.html,
   calpoly/frontend/templates/thelab.html,
   calpoly/frontend/templates/tutoring.html,
   calpoly/frontend/templates/users/officers.html,
   calpoly/frontend/templates/users/profile.html: Add minified page CSS