region: Duplicate functionality from district module

district/blocks.py

district/models.py

...rict/templates/district/blocks/homepage_header_block.html

...mplates/district/blocks/homepage_simple_header_block.html

district/templates/district/district_contact_page.html

region/blocks.py

region/models.py

region/templates/region/blocks/address_block.html

.../templates/region/blocks/call_to_action_button_block.html

region/templates/region/blocks/candidate_list_block.html

region/templates/region/blocks/contact_block.html

region/templates/region/blocks/election_header_block.html

...templates/region/blocks/homepage_simple_header_block.html

region/templates/region/blocks/people_group_block.html

region/templates/region/blocks/program_block.html

region/templates/region/blocks/redmine_program_block.html

region/templates/region/blocks/static_program_block.html

region/templates/region/region_after_election_page.html

region/templates/region/region_article_page.html

region/templates/region/region_articles_page.html