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).

MapleIdRetriever/lib/fetch.txt

@@ -0,0 +1,50 @@
+Heaven's Hammer
+
+Blue Potion
+White Potion
+Elixir
+Mana Elixir
+Power Elixir
+Pure Water
+Ice Cream Pop
+Red Bean Sundae
+Unagi
+Watermelon
+Sunrise Dew
+Sunset Dew
+
+Screw
+
+White Napoleon
+Black Napoleon
+Green Napoleon
+Red Napoleon
+Blue Napoleon
+Blue Justice Cape
+Red Justice Cape
+White Justice Cape
+Black Justice Cape
+Blue Moon
+Skull Earrings
+Red-Hearted Earrings
+Sapphire Earrings
+Cat's Eye
+Blue Moon
+Maple Throwing-Stars
+
+Adamantium Ore
+Bronze Ore
+Gold Ore
+Mithril Ore
+Orihalcon Ore
+Silver Ore
+Steel Ore
+Amethyst Ore
+Aquamarine Ore
+Black Crystal Ore
+Diamond Ore
+Emerald Ore
+Garnet Ore
+Opal Ore
+Sapphire Ore
+Topaz Ore