some changes from the imogen branch

[technillogue]

includes:

• new flags: ADMINS, ADMIN_GROUP, UPLOAD (upload-only).

• last_node_name column in signal_accounts table, like active_node_name and also they include app name. list_accounts uses your timezone

• refactor command matching and message text parsing. include device_id, reaction, and quote. shouldn't have breaking changes.

• move commands from Bot to ExtrasBot (could be renamed), drop invoices, allow using separate ledgers, time postgres queries

• try checking out some changes

• clean up

[technillogue]

• changelog
• test reaction on auxin
• uuud