Use rules to configure faction thresholds

Default to legacy values. Updated "accurate" values are available in optional database script

utils/sql/git/optional/2019_04_12_update_faction_thresholds.sql

@@ -0,0 +1,10 @@
+INSERT INTO rule_values VALUES
+	(0, "Faction:AllyFactionMinimum", 1100),
+	(0, "Spells:WarmlyFactionMinimum", 750),
+	(0, "Spells:KindlyFactionMinimu", 500),
+	(0, "Spells:AmiablyFactionMinimum", 100),
+	(0, "Spells:IndifferentlyFactionMinimum", 0)
+	(0, "Spells:ApprehensivelyFactionMinimum", -100)
+	(0, "Spells:DubiouslyFactionMinimum", -500)
+	(0, "Spells:ThreateninglyFactionMinimum", -750)
+;