Dragable song list items

You may like to extend it to act on currentlist.
Also feel free to adjust the CSS.
Continued implementation of swipeable and reorderable lists

Took reooderable off of library and added to custom
implemented (partially and very basic) swipe library to add to custom
Custom list reorderable.

I assume that you will have ideas about how you would like it implemented, so I did not go into detail.
Merge pull request #17 from johncc47/master

Dragable customList items and swipe