Support of FragmentActivity

Hi @gueei ,

I like your project and it saves me time. Thanks for that.

I was wondering if you are planning to add support for FragmentActivities. I need them for my project. If you don't have the time or don't want to implement it, please let me know. With some instructions I can try to implement this if you want.

Very nice project, keep up the good work :+1: 
