Presenting dropdown above

It is now possible to present the dropdown on top of the menu:

dropdownMenu.dropdownShowsContentAbove = YES;

A big thanks to @EddieLukeAtmey for this addition! 🎉

Add UIAppearance support

1.2

Add scroll view support

The presentation logic is changed, now a specific presenting view can be used to host the dropdown.
Added support for presenting the dropdown menu in UIScrollView.

1.0.1

Update podspec

1.0

Update README