_s: Move away from using <article> for content that is not syndicated.
_s: Let's not change .entry-date.
_s: Let's keep the `.entry-` namespace for page post types.
_s: Let's keep the `.entry-` namespace for attachment post types.
Fixes the broken display header text option in the Customizer.
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.
_s: Removes unnecessary switch in and out of PHP.
Merge branch 'master' of https://github.com/Automattic/_s.git
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.
Fix unlinked site title in the Customizer
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.