Proposal to add the original JQuery event in the options of an aciTree event

[alainpannetier]

I'm not sure whether I'm doing things correctly but here it is.

I'm implementing a different behaviour when processing a 'selected' event depending on whether the selected item has been selected through left or middle click (expand all). For this I need to access the orginal JQuery 'click' or 'mousedown' event. I could not retrieve it from within the 'selected' handler.

I had to add it in the source of aciCore (#select) in the dispatched options. There might be a better way.