Initial commit for _sass.

Props @michaelArestad @hugobeta, and @jacklenox.

* Give prefix to variable files. This avoids confusion with files of similar names like typography. It also helps with the visual recognition over what file does what.
* Set up mixins-master.
* Setting foundation for encouraging in larger projects use of more than one mixing file. This creates a master mixins file that we can then bring subs into if the project grows.
* Fixed line breaks, spacing and new lines. Props @gregrickaby.
* Nest widget select. Props @gregrickaby.
* Make variables be variables-site. Makes this the global variables folder. People can then use sub folders in sections for local only variables.
* Change content directory to be site directory.
* Remove zip. Revert `style.css` to not be auto generated version.
* Fixes rem size issue on body font.
* Fixes for differences between `_s` and `_sass`. Fixed font sizes, added in display block to classes so they compile and the theme check
passes.
* Remove text domain and clean up css.

sass/style.scss

@@ -0,0 +1,108 @@
+/*
+Theme Name: _s
+Theme URI: http://underscores.me/
+Author: Automattic
+Author URI: http://automattic.com/
+Description: Hi. I'm a starter theme called <code>_s</code>, or <em>underscores</em>, if you like. I'm a theme meant for hacking so don't use me as a <em>Parent Theme</em>. Instead try turning me into the next, most awesome, WordPress theme out there. That's what I'm here for.
+Version: 1.0-wpcom
+License: GNU General Public License v2 or later
+License URI: http://www.gnu.org/licenses/gpl-2.0.html
+Text Domain: _s
+Tags:
+
+This theme, like WordPress, is licensed under the GPL.
+Use it to make something cool, have fun, and share what you've learned with others.
+
+ _s is based on Underscores http://underscores.me/, (C) 2012-2014 Automattic, Inc.
+
+Resetting and rebuilding styles have been helped along thanks to the fine work of
+Eric Meyer http://meyerweb.com/eric/tools/css/reset/index.html
+along with Nicolas Gallagher and Jonathan Neal http://necolas.github.com/normalize.css/
+and Blueprint http://www.blueprintcss.org/
+*/
+
+/*--------------------------------------------------------------
+>>> TABLE OF CONTENTS:
+----------------------------------------------------------------
+1.0 - Reset
+2.0 - Typography
+3.0 - Elements
+4.0 - Forms
+5.0 - Navigation
+	5.1 - Links
+	5.2 - Menus
+6.0 - Accessibility
+7.0 - Alignments
+8.0 - Clearings
+9.0 - Widgets
+10.0 - Content
+	10.1 - Posts and pages
+	10.2 - Asides
+	10.3 - Comments
+11.0 - Infinite scroll
+12.0 - Media
+	12.1 - Captions
+	12.2 - Galleries
+--------------------------------------------------------------*/
+@import "variables-site/variables-site";
+@import "mixins/mixins-master";
+
+/*--------------------------------------------------------------
+1.0 - Reset
+--------------------------------------------------------------*/
+@import "reset";
+
+/*--------------------------------------------------------------
+2.0 Typography
+--------------------------------------------------------------*/
+@import "typography/typography";
+
+/*--------------------------------------------------------------
+3.0 Elements
+--------------------------------------------------------------*/
+@import "elements/elements";
+
+/*--------------------------------------------------------------
+4.0 Forms
+--------------------------------------------------------------*/
+@import "forms/forms";
+
+/*--------------------------------------------------------------
+5.0 Navigation
+--------------------------------------------------------------*/
+@import "navigation/navigation";
+
+/*--------------------------------------------------------------
+6.0 Accessibility
+--------------------------------------------------------------*/
+@import "modules/accessibility";
+
+/*--------------------------------------------------------------
+7.0 Alignments
+--------------------------------------------------------------*/
+@import "modules/alignments";
+
+/*--------------------------------------------------------------
+8.0 Clearings
+--------------------------------------------------------------*/
+@import "modules/clearings";
+
+/*--------------------------------------------------------------
+9.0 Widgets
+--------------------------------------------------------------*/
+@import "site/secondary/widgets";
+
+/*--------------------------------------------------------------
+10.0 Content
+--------------------------------------------------------------*/
+@import "site/site";
+
+/*--------------------------------------------------------------
+11.0 Infinite scroll
+--------------------------------------------------------------*/
+@import "modules/infinite-scroll";
+
+/*--------------------------------------------------------------
+12.0 Media
+--------------------------------------------------------------*/
+@import "media/media";