Adds Paradise Sofas (#2623)

* Adds Paradise Sofas

* Actually enable them to be constructed

* Coding standards, sheesh

* am path guder

code/game/objects/structures/beds_chairs/sofa.dm

@@ -0,0 +1,12 @@
+/obj/structure/chair/sofa
+	name = "old ratty sofa"
+	icon_state = "sofamiddle"
+	icon = 'icons/obj/sofa.dmi'
+	buildstackamount = 1
+
+/obj/structure/chair/sofa/left
+	icon_state = "sofaend_left"
+/obj/structure/chair/sofa/right
+	icon_state = "sofaend_right"
+/obj/structure/chair/sofa/corner
+	icon_state = "sofacorner"