feat(collision): overlapping region as a config option
feat(coords): add destroy method
feat(coords): allow both (left/x1) and (top/y1) attr keys
feat(draggable): keep container position prop if different than static
feat(gridster): destroy element's data and optionally remove from DOM
Release v0.5.1
feat(draggable): option to not remove helper on drag stop
chore: update dist
feat(draggable): allow ignore_dragging config option to be a function
update dist
Merge branch 'master' of https://github.com/ducksboard/gridster.js