Update lib/jquery.dialog2.js

Changed .text() value passing on button to .html()
Update lib/jquery.dialog2.js

Added a([tabindex!='0']) to the focus handler so that you can skip html links by changing the markup. This lets you put focus on the first form element instead of an informational link or help link that shows up first.
Update lib/jquery.dialog2.js

Allows any element to be ignored not just anchors as per HTML5 spec.
Merge pull request #68 from TomCrowley/master

Fix #68: Passing button contents to new modal