Allow multiple Templates to apply to a Series, add Filters to Templates

[CollinHeist]

The obvious way to implement this is new options watched_card_type and unwatched_card_type.. not very elegant, but very straightforward.

[CollinHeist]

I think this is better implemented as allowing filters to be applied to Templates. This is a bit more versatile, and as long as templates can be tiered for a given series, is much more versatile.

Changing this issue, and I think this logic is best implemented in #311, as it'd require modifying the YAML-based logic too much to justify redoing.