created template to list categories and inserted it in base template
all pages showing categories
removed search button in nav bar
category page now has the form to make queries using bing api and should display a list of results if a query  is done. however this functionality is not implemenet yet.
added legend to form in category form
category page making queries for pages
added url to allow user visualizing its own profile
created view to allow user to see its profile
my_profile page
allowing user to register using interface
updated gitignore file