Switch to bootstrap design.
Wrap most of the index page functionality with bootstrap.
Rework category list buildout.
add django_image_cropping(still inoperative, though).
Add all the files required for bootsrap framework.
Fix product thumbnail CSS classes.
Style some UI parts, add Homepage seo text.
Add search bar to nav  bar.
Restyle navbar elements appropriatley.
Add a HomepageSeoText model, so that a user-written text could be added
to main page via admin panel.(Uses a singleton model and a django-solo package.)
Style product page.
Fix product review
 Add brand model. Add product page brand styling.