#261 spawns table needs a water spawn and flying spawn type support

Need a flag to allow these options to be set by spawn

alter table spawn_npcs add column water_type tinyint(1) unsigned not null default 0;
alter table spawn_npcs add column flying_type tinyint(1) unsigned not null default 0;

supplementing with using the code values until we have all the DB entries updated in spawn_npcs

    RULE_INIT(R_Spawn, UseHardCodeWaterModelType, "1"); // uses alternate method of setting water type by model type (hardcoded) versus relying on just DB
    RULE_INIT(R_Spawn, UseHardCodeFlyingModelType, "1"); // uses alternate method of setting flying type by model type (hardcoded) versus relying on just DB

if flying type / water type isn't set already, then we will check by model type by a hard coded set. Once we have DB in place these rules can be disabled (0)