Turn post thumbnail support off by default, as it's used nowhere in the theme by default. Also add a DocBlock into the theme which gives more information on post thumbnail support implementation.
Remove  title attributes where it duplicates  in anchor text. See http://core.trac.wordpress.org/ticket/24203.
Merge pull request #209 from Automattic/remove-redundant-title-attributes

Remove `the_title_attribute` title attributes where it duplicates `the_title` in anchor text. See http://core.trac.wordpress.org/ticket/24203.
DocBlock adjustments to post thumbnail support. See #207.
Merge pull request #207 from Automattic/post-thumbnails-off-by-default

Turn featured thumbnail support off by default.
Remove HTML5Shiv from _s. See #215.
Remove trailing whitespace.
Merge pull request #221 from kovshenin/patch-14

Pinking shears; remove trailing whitespace.
_s: Better use of template tags in the image template.
_s: Cache header text color value;
_s: Let's not limit the setup function to IS.
_s: Load all modules consistently at the bottom of the file.
Comments.php Spelling Issue
Merge pull request #216 from Automattic/ditch-html5shiv

_s: Remove HTML5Shiv.
_s: Remove .error404 class, it is used by core in `body_class()`. Props
@mfields. Fixes #195.
Merge branch 'master' of https://github.com/Automattic/_s.git
Merge pull request #224 from JasonHoffmann/master

_s: Align element comment with its corresponding id.
_s: Update comment markup to make it forward compatible with html5
comments in 3.6. As a result the custom callback can be safely removed
in the future. Also closes #220.
_s: Require is a statement, not a function. Props @drrobotnik. Fixes
#213.
Merge branch 'master' of https://github.com/Automattic/_s into Automattic-master