Append global var requirejs
#251 - 'SortableEvent' must use 'JQueryEventObject' instead 'Event'
Merge pull request #1014 from SomaticIT/fix-require

Append global var requirejs
Merge pull request #1021 from Diullei/issues251

#251 - 'SortableEvent' must use 'JQueryEventObject' instead 'Event'
Update README.md - History.js have a new link (https://github.com/browserstate/history.js)