Use matchMedia instead of minWidth

This is referenced to https://github.com/OwlFonk/OwlCarousel2/issues/327
I removed the proposed options and replaced the width check with matchMedia. 

This is just to start this up, because I believe this is a really needed feature I'd like to see in Owlcarousel soon.  Would love some feedback about this. I guess at least documentation should be adjusted and I don't know what I missed.