tooltip data-delay attribute syntax

[hansifer]

The syntax for specifying a tooltip show and hide data-delay via data attribute needs to be clarified in the documentation. Specifically, an attribute value of { show: 500, hide: 100 } will not work, as properties require double-quoting as in { "show": 500, "hide": 100 }.

I further recommend support for specifying tooltip show/hide delay ms individually via separate data attributes as in data-delay-show and data-delay-hide.