Merge pull request #846 from OpenTechFund/feature/820-updates-to-search

opentech/apply/urls.py

opentech/apply/utils/__init__.py

opentech/apply/utils/app.py

opentech/apply/utils/templates/apply/404.html

opentech/apply/utils/views.py

...blic/mailchimp/templates/mailchimp/newsletter_signup.html

opentech/public/search/views.py

opentech/settings/base.py

opentech/templates/base.html

opentech/urls.py