Tooltips

<a href="#" {{tooltip "Tooltip on top"}}>
  Tooltip on top
</a>
<Bs::Button {{tooltip "Tooltip on top"}} {{on "click" this.go}}>
  Tooltip on top
</Bs::Button>
<Bs::Button
  {{tooltip "Tooltip on right" placement="right"}}
  {{on "click" this.go}}
>
  Tooltip on right
</Bs::Button>
<Bs::Button
  {{tooltip "<em>Tooltip</em> <u>with</u> <b>HTML</b>" html=true}}
  {{on "click" this.go}}
>
  Tooltip with HTML
</Bs::Button>