Changed how effects are applied and removed to enable effects expiring after a set duration.

rpg-docs/lib/functions/characterUtility.js

@@ -0,0 +1,7 @@
+getMod = function(score){
+	return Math.floor((score-10)/2);
+}
+
+signedString = function(number){
+	return number > 0? "+" + number : "" + number;
+}