Upgrade to 0.29

[lizconlan]

ToDo

• [x] Check overridden templates for <%= flash[:notice] %> (see upgrade branch)
• [x] Check template changes
• [x] Check/regenerate theme translations
• [x] Get translations updated
• [x] Test locally
• [x] Merge the upgrade-to-0.29 theme branch

Deploy to-do list

• [x] Migrate COOKIE_STORE_SESSION_SECRET value to SECRET_KEY_BASE
• [x] Add BLOCK_RATE_LIMITED_IPS, BLOCK_RESTRICTED_COUNTRY_IPS, BLOCK_SPAM_ABOUT_ME_TEXT, BLOCK_SPAM_COMMENTS, BLOCK_SPAM_EMAIL_DOMAINS, BLOCK_SPAM_REQUESTS and ENABLE_ANTI_SPAM config values.
• [x] Deploy
• [x] Run bundle exec rake temp:cache_delivery_status
• [x] Run bundle exec rake db:seed
• [x] Run bundle exec rake temp:migrate_admins_and_pros_to_roles
• [x] Run bundle exec rake temp:remove_line_breaks_from_request_titles
• [x] Run bundle exec rake temp:generate_request_summaries
• [x] Run bundle exec rake temp:set_use_notifications

[lizconlan]

I've pulled in the latest theme translations (now showing as 100% translated) and the main translations are up to date with 0.29.0.2

[lizconlan]

Should just need a quick check to make sure I've not missed anything then it's good to go

[garethrees]

Done