Fixed an issue that would let a player to delay or anticipate the next
map hpDec proc in certain conditions. Implemented mechanic that enables
the DB save of expiration times for quests that needs this.
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).
