Arranges lots of things into planes (#5072)

* Rearranges a billion things into planes

* Make cryotubes fancy

* Update Travis

* Fix hiding logic

code/modules/paperwork/paper.dm

@@ -13,7 +13,8 @@
 	w_class = ITEMSIZE_TINY
 	throw_range = 1
 	throw_speed = 1
-	layer = 4
+	plane = MOB_PLANE
+	layer = MOB_LAYER
 	pressure_resistance = 1
 	slot_flags = SLOT_HEAD
 	body_parts_covered = HEAD

code/modules/paperwork/paper_bundle.dm

@@ -8,7 +8,8 @@
 	w_class = ITEMSIZE_SMALL
 	throw_range = 2
 	throw_speed = 1
-	layer = 4
+	plane = MOB_PLANE
+	layer = MOB_LAYER
 	pressure_resistance = 1
 	attack_verb = list("bapped")
 	var/page = 1    // current page