18 add more operations for modifiers (#23)

* Added Operations and Combat Conditions

+ Added Multiply, Division and Subtract operations for modifiers
+ Added Combat Conditions Effects form Ars Armorum

* Added Math.floor()

* Fixed Operations and Combat Conditions

lang/de.json

@@ -275,6 +275,10 @@
 	"midgard5.mod-operation-add": "Addieren",
 	"midgard5.mod-operation-set": "Basiswert",
 	"midgard5.mod-operation-fixed": "Fester Wert",
+	"midgard5.mod-operation-subtract": "Subtrahieren",
+	"midgard5.mod-operation-multiply": "Multiplizieren",
+	"midgard5.mod-operation-division": "Dividieren",
+
 
 	"midgard5.mod-stat-defenseBonus": "Abwehrbonus",
 	"midgard5.mod-stat-attackBonus": "Angriffsbonus",