Updates a item sprite and adds 2 approved items

http://baystation12.net/forums/viewtopic.php?f=33&t=10693
http://baystation12.net/forums/viewtopic.php?f=33&t=10678
Paths to new files are:
/obj/item/weapon/lighter/zippo/fluff/isaac_jachym
/obj/item/clothing/shoes/jackboots/fluff/kecer_eldraran
Fixes the jackboots
Merge pull request #5384 from Jarcolr/custom_item

Updates a custom item sprite and adds 2 approved custom items