Merge pull request #82 from benhutchins/master

Adding missing dependency of jquery.disableEvent.js to jquery.modalDialogContent.js
Removing unused option
Implement preventEventBubbling setting for dialogs
Removing dead comment
Remove Object.keys polyfill to avoid global conflicts
Removed last remnant of jquery.transit
Removing unused option: reuse
Innocuous change to trigger a new build in Travis CI
Don't put minimum breakpoints on an element with 0 width: not being rendered is not the same as being small. This should reduce the number of page reflows.
Since the dialog background is a sibling of the dialog, and not its parent, we need to extend event bubbling protection to it as well.
Fixing bug where preventEventBubbling option breaks drag/drop
I realized that preventEventBubbling must be disabled for backwards compatibility