Incorporated new Builds tags;  various other fixes
Feature removal and UI fixes for Builds
Code preparation for Blight
Yield changes and resource AI improvement
New table tags to identify worker type units

ALTER TABLE Units ADD COLUMN 'IsWorker' BOOLEAN DEFAULT NULL;
ALTER TABLE MinorCivilizations ADD COLUMN 'WorkerUnitType' TEXT DEFAULT
NULL;
Exploding plot mechanic
Plot effect UI; Explosive Runes spell (w/out AI)
Merge branch 'master' of https://github.com/Pazyryk/Ea_III_Sword_and_Sorcery