v3.0

Added webpages (with mobile layouts):

• Index (localhost:5000/)
• Map (localhost:5000/map)
• Settings (localhost:5000/settings)
• JSON alert feed (localhost:/alerts.json)

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• Updated documentation for local server setup.
• Added a manual refresh button to the main Index webpage.
• Updated translations.py.

Full Changelog: 2.2...v3.0