timeout option not working

[swapsmagic]

I tried passing the timeout option to the fbgraph object and looks like it is not being passed to the request object.
And that makes the request not to timeout if the request takes more time that the set by setOptions parameter.

Found the reason looks like due to following line of code:
https://github.com/criso/fbgraph/blob/master/lib/graph.js#L222
Where it is assumped that Graph object will get the same this as the current object, which is not true.

The solution for this is to passing options as parameter to Graph function.

[criso]

wow. Yeah, no clue what happened there. haha... that would never work.

[swapsmagic]

#12 to fix the issue