facebook part does not work with fb sdk 4+

[satishkadyan]

Hi,

I know this project is not maintained longer.
But still want to seek help, if it is possible, library FB portion can be fix for FB new version 4+ or lastest.
library is very good, but new fb version removed many classes and changed functionality classes.
if it is possible or any plan to upgrade project to higher fb version, it will be good, and usable for fb new version of sdk.
thanks, for great library, really found very useful