Django 1.11 support

[yn-coder]

Nice package, but it look outdated,

I've got the problems when run on actual Django 1.11

Bootstrap v3.3.6

1. Build_attrs in widget.py raise a python error. build_attrs function changed on django 1.11 #67 pull is helping, but
2. Javascript libs look outdated, buttons is frozen and (index):34 Uncaught TypeError: jQuery(...).datetimepicker is not a function is in browser console

Could you suggest a actual working fork?