Add the 'search' application skeleton.
Merge branch 'master' into search
Merge branch 'develop' into search
Merge branch 'search' into develop
Add initial stage for category app.
Remove old Category class.
Change view names.
Overriding get_queryset instead get_context_data for ListView.
Add link to category for mixture.
Add contact email for context settings.
Add translation URL configurations and category URLs.
Add contact email to base template.
Add link to categories list.
Fix imports for web.
Add initial migrations for category app.
Add basic template for category list.
Merge branch 'add-category-app' into develop