MapleCouponInstaller + EXP/DROP Coupon System

Added mechanics for the EXP/DROP cash coupons (such as enabling
out-of-time active coupons via command and automatic update of active
ones over the designed interval). Created MapleCouponInstaller as means
to gather info about the coupon intervals and rates from the WZs (the
generated SQL table is already updated on the db_database.sql file).

src/constants/GameConstants.java

@@ -89,9 +89,9 @@ public class GameConstants {
         return skillId > 1111002 && skillId < 1111007 || skillId == 11111002 || skillId == 11111003;
     }
     
-	public static boolean hasSPTable(MapleJob job) {
+    public static boolean hasSPTable(MapleJob job) {
         switch (job) {
-			case EVAN:
+            case EVAN:
             case EVAN1:
             case EVAN2:
             case EVAN3: