It turns out that 'title case' is a thing in unicode,
in the same way upper/lower case is.
What our users will want is the first character of a word
being titlecased, which `title` will do.
- Cut back to bare minimum to make the rest simpler
- Consistency in config naming
- Have one data strucutre that's the same for all templates
- Pass in common labels to templates
- Support templates almost everywhere
- Support multiple SMTP recipients
- Support non-ASCII SMTP headers
- Handle colour logic via templates
- Make $subjects have consistent output, go maps aren't sorted.
- Make tests pass when v6 is disabled
No longer update components based on a new configuration. Generally,
destroying and recreating has no performance impact and is less
error-prone.
This also removes the Reloadable interface and simplifies the entire
startup contraption.
