Adds *6* approved custom items to code

Adds 6 approved custom items and their sprites/paths.
http://baystation12.net/forums/viewtopic.php?f=33&t=9776
http://baystation12.net/forums/viewtopic.php?f=33&t=9992
http://baystation12.net/forums/viewtopic.php?f=33&t=10107
http://baystation12.net/forums/viewtopic.php?f=33&t=10197
http://baystation12.net/forums/viewtopic.php?f=33&t=10265
http://baystation12.net/forums/viewtopic.php?f=33&t=10398

Paths to files are:
/obj/item/clothing/head/helmet/fluff/adapted for Serithi's item.
/obj/item/clothing/mask/surgical/fluff/primitive for Ikky's item.
/obj/item/weapon/cane/fluff/ryals for Meyar's item.
/obj/item/clothing/suit/fluff/b_dress for 50_n00b's item.
/obj/item/weapon/folder/blue/fluff/officer_notebook for Serveris's item.
/obj/item/clothing/under/rank/nursesuit/fluff/sasha for Secret (sitp)'s item.