Maximum assistant power is currently 3; make some more code aware that assistant power greater than 2 is possible, so that the level 3 upgrade doesn't actually make things worse.

fix double period

See merge request pregmodfan/fc-pregmod!5100

More bodymod dupes

See merge request pregmodfan/fc-pregmod!5099

Scars on market slaves

See merge request pregmodfan/fc-pregmod!5093

Fix-SF

See merge request pregmodfan/fc-pregmod!5097

more hostage fixes

See merge request pregmodfan/fc-pregmod!5096

fix hostage

See merge request pregmodfan/fc-pregmod!5095

fix belly piercing desc

See merge request pregmodfan/fc-pregmod!5094

Scars for hostage

See merge request pregmodfan/fc-pregmod!5092

Skill system for custom slave

Closes #918

See merge request pregmodfan/fc-pregmod!5088

Rapid gestation fix

See merge request pregmodfan/fc-pregmod!5089

Universal rules fixes

Closes #919

See merge request pregmodfan/fc-pregmod!5087