Ghetto Banana Lamp

 -Removed the duplicated brightness on the green desk lamp, as it will inherit
  the brightness from the foremost.
 +Added the coding for the Banana Lamp

lighting.dmi
 +Added a new sprite for the lamp: A ghetto Banana Lamp!

EDIT: I totally forgot the Images!
Banana lamp off
![bananalamp 1](https://cloud.githubusercontent.com/assets/4064043/5054070/206ccba4-6c1f-11e4-9d80-36e52653fdc0.PNG)

Banana Lamp on
![bananalamp1-on](https://cloud.githubusercontent.com/assets/4064043/5054079/31b66e88-6c1f-11e4-99c2-d21eb3571796.PNG)

The thing in game.
![scrnshot1](https://cloud.githubusercontent.com/assets/4064043/5054105/608e7d18-6c1f-11e4-9565-932a0fc6ddfb.png)