BetterCalc 2.1:tm:

[Aurelius7309]

• Adds util functions for a lot of code that was previously patched into state_events.lua. This should further simplify adding calculation to custom card areas. Added functions are score_card, calculate_main_scoring, calculate_end_of_round_effects, calculate_destroying_cards.
• Adds SMODS.optional_features, which can be enabled by defining a optional_features function (or table, in which case calling it is skipped). Currently available options are cardareas.deck and cardareas.discard to enable scoring calculation for the respective areas.
• Adds context.main_eval to calculation that affects jokers directly and doesn't have a secondary card, replaces not context.individual and not context.repetition.

[Aurelius7309]

Note: this includes the enhancement cache commit because i started working on this using the wrong branch. Its code has been removed because it has not been fully reviewed, which I'm planning to do later.