v2.0.0 - Automation of round-based saving throws

Due to math implementation differences between FG Classic and FG Unity, this version of Disease Tracker marks the end of support for FG Classic (unless ClockAdjuster gets an update).

This brings support for auto-rolling based on the round counter (for maladies with save intervals measure in rounds).
This works by adding the current round to the current time as .1 minutes (per round).

A potential issue to be aware of is the transition between micro and macro timekeeping (in/out of combat, basically).
Because the round counter can exceed 10, it progresses time as used for malady tracking (but doesn't advance the actual clock). The saving throw code should be 'smart' enough to handle this without rolling incorrect numbers of saves, but it will mean that when you reset the initiative counter the 'disease clock' go back a number of minutes (# of rounds previously in the combat tracker * 0.1)