Screenshot:

(this mod adds the logs and the fire, the rest is default wood)
Crafting:
T=tree
|_|T|_|
|T|_|T|
|_|_|_| (you can make the empty spots in the top or the bottom, it doesn't matter)
License: WTFPL (except the textures I got from default)
Download:
https://www.dropbox.com/s/b8hhqfnnm0ob6p6/fireplace.zip (version 2, fixed the bug where if you point a torch where there isn't a node the game will crash, and now you can craft a fireplace with any type of tree trunk)
https://www.dropbox.com/s/es61yxzsq77lawv/fireplace.zip (version 1)
If you see any problems post them