Body accessory system

This commit adds a modular system for selectable body accessories. These
accessories are currently split into two primary groups,
"/body_accessory/body" and "/body_accessory/tail", for "body" sprites and
"tail" sprites respectively. (also known as a subtype just for vorestation
taur sprites)

Basically, this allows for selectable tails. This commit doesn't include
any subtypes, which will cause the startup hook to fail. The only subtypes
this actually includes is a snake 'body'.

Admins can select any tail, regardless of species restriction. Admin-only
subtypes are simply defined by not adding any species to the whitelist.
Note, as this system uses the body color system, admins may also use the
body colors at any time regardless of race.

SQL/paradise_schema.sql

@@ -78,6 +78,7 @@ CREATE TABLE `characters` (
   `rlimb_data` mediumtext NOT NULL,
   `nanotrasen_relation` varchar(45) NOT NULL,
   `speciesprefs` int(1) NOT NULL,
+  `body_accessory` mediumtext NOT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=18747 DEFAULT CHARSET=utf8;
 /*!40101 SET character_set_client = @saved_cs_client */;