Comfychairs Update + Armrests

* Made comfy chairs colourable by RGB rather than fixed onto the icon. Colors can be set by mappers with the color var, or by using the traditional object children (comfy/teal, comfy/brown, etc).

* For mappers: comfy chair types are still the same, they all look like grey comfy chairs in the object tree but will have their correct colors ingame and on the map in DM.

* Made comfy chairs armrests be ontop of mobs buckled to them.

![boop](https://cloud.githubusercontent.com/assets/2332094/2668253/55c0d4d0-c0b7-11e3-857f-594e99e6cdd5.gif)

From /tg/. Map changes are because people had manually set the icon_state for a few different comfy chairs. Pushing this to master, if this should go to dev let me know.