Added 'dialog', 'main', 'var' tags. Removed 'hgroup' tag. Fixed 'wbr' tag.
Merge pull request #37 from Janther/html5_tags

Tag list updated to current HTML5 specification.
Use SVG Travis badge
Added spec for data object into data attributes

HAML style
Data object into data attributes HAML style
when passing an object into an attributeName it iterates through all the keys building prefixed attrs
For better performance nested objects only will work for data attributes