Billboard - option to grow bb out of a rect, rather than a point.
Jiggle transform-origin to thwart over-zealous compressors.

Some CSS compressors wil reduce `transform-origin: 0 0;` to
`transform-origin: 0` - which browsers understand as `0 50%`. This is
clearly a bug in those compressors, so here is a temporary workaround.
Stop event propagation when dismissing popover controls

This prevents page turns with the magic panels when you clock outside of
a control to dismiss it.
Merge pull request #198 from rschroll/dismiss-control

Stop event propagation when dismissing popover controls
Stencil links behavior: can cancel by listening on an event.

The events you can preventDefault() are:

* monocle:link:internal
* monocle:link:external
Gala.stop events outside the popover control.

Following on from @rscholl's work.
Merge remote-tracking branch 'upstream/master'