Unbind all event handlers.

[vlazh]

In tooltip/popover has next code:
element.unbind( triggers.show );
element.unbind( triggers.hide );

My other plugins don't work, because ui.bootstrap unbind all handlers from elements.

[pkozlowski-opensource]

Good catch @emsoft !

In fact this is duplicate of #456

@joshdmiller I could try to push a fix for this one but I you might have started some worh on #456, no? Let me know, I can prepare a PR.