Adding Click Trigger

[justingshreve]

Added ability to trigger hovercard via click, instead of just mouseenter...

<hovercard hover-tmpl-url="/app/templates/test.html" trigger="click"></hovercard>

Still defaults to mouseenter, unless attr.trigger = click exists.

Had to change some stuff in your tests too, to get them to pass. Couldn't get them to pass even when I pulled down fresh.

There are a lot of commits, but changes are minor. Played around with some stuff in various commits.

[yaru22]

Hi @justingshreve, thanks for your contribution. Before I merge it in, could you add an example to the demo for click-to-show?
Also, from the code, it looks like when you click to show the hover card, it will disappear when your mouse leaves the card. Wouldn't it be better to dismiss the hover card (if it was brought up by a click) when you click elsewhere instead of moving the mouse cursor out? What do you think?