The <u> tag is not deprecated in HTML5, it's usage is merely changed.

http://dev.w3.org/html5/html4-differences/#changed-attributes
Adds deprecated attributes.

body background,
* align
* valign
* bgcolor
* clear
ul type, li type
As per http://dev.w3.org/html5/html4-differences/#obsolete-attributes
Updated testsuite to reflect recent changes.
Updated minified CSS.
Merge pull request #12 from danielgwood/master

Updated deprecated attributes and tags.
Removed error for missing title attributes, and downgraded empty alt to warning
Fix link
Merge pull request #15 from SamHasler/patch-1

Fix link
Improved rendering of class name

The prior text, "__holmes-debug__", was rendered exactly thus.
By using `holmes-debug`, the markdown is rendered as a code section.
This helps with the confusion some might have that their class
should be __holmes-debug__.
Merge pull request #16 from awayken/patch-1

Improved rendering of class name
Merge pull request #1 from redroot/master

Pull latest version of Holmes