Added Temp/Perm Vehicle Spawn selection with images

Need to add this line in the description.ext, at the bottom of the file.
#include "admintools\dialog.hpp"

Selecting the menu the 1st time will take some time to load, but after that it will pop out fast.
There are 3 buttons on the dialog window, "Temp", "Perm", "Close". 
"Temp" selection will make a temporary vehicle...etc etc

![spawner](https://f.cloud.github.com/assets/204934/2229988/1963d124-9af9-11e3-82ce-ce4a8e2d3fc5.png)