Server env vars

• Fix the release to remove the word 'dingus' from server.php.
• Merge #25 to get environment variables more robustly.

Merged PRs and various fixes.

• User can define TODO_PER_USER_FOLDERS.
• cljs Linter fixes.
• Test and fix on PHP 8.
• Build fixes and package upgrades.
• Source map support for debugging.
• Allow for no-server demo mode.

Fixes and usability tweaks

• Do not include .git folder in zip release.
• Use minified CSS in prod build.
• Fix view component reloading.
• Fix server URL when on list subpage.
• Show loading spinner on pages until server data.
• Additional messaging for empty lists.
• Updated drag icon to bars and swapped with delete.
• In ?demo mode don't wait for server.

Various fixes

• Fix sortable list items.
• Improve text box focus handling.
• Make polling more robust to bad data.
• Fix warnings on Chrome Android.
• Implemented long-polling backoff algorithm.
• Fix manifest.json title & remove start URL.
• Fix floating point issue in server.
• Use POST for deletion request as per web security standards.
• Include csrftoken cookie if present.
• Update release.

0.2: Fix dev/prod build settings.

Fixes #7

0.1

Poller time set by dev mode.