Added Less Framework 4

Addition of the Less Framework 4 (http://lessframework.com/) to CSS frameworks on top of changes to the CSS frameworks code refactoring by swalkinshaw in commit 539198a.

.gitignore

@@ -0,0 +1,2 @@
+
+css/.DS_Store

css/less/less.css

@@ -0,0 +1,167 @@
+/*	Less Framework 4
+	http://lessframework.com
+	by Joni Korpi
+	License: http://opensource.org/licenses/mit-license.php	*/
+
+
+/*	Resets
+	------	*/
+
+html, body, div, span, object, iframe, h1, h2, h3, h4, h5, h6, 
+p, blockquote, pre, a, abbr, address, cite, code, del, dfn, em, 
+img, ins, kbd, q, samp, small, strong, sub, sup, var, b, i, hr, 
+dl, dt, dd, ol, ul, li, fieldset, form, label, legend, 
+table, caption, tbody, tfoot, thead, tr, th, td,
+article, aside, canvas, details, figure, figcaption, hgroup, 
+menu, footer, header, nav, section, summary, time, mark, audio, video {
+	margin: 0;
+	padding: 0;
+	border: 0;
+	text-align: left;
+}
+
+article, aside, canvas, figure, figure img, figcaption, hgroup,
+footer, header, nav, section, audio, video {
+	display: block;
+}
+
+a img {border: 0;}
+
+
+
+/*	Typography presets
+	------------------	*/
+
+.gigantic {
+	font-size: 123px;
+	line-height: 132px;
+	letter-spacing: -2px;
+}
+
+.huge, h1 {
+	font-size: 76px;
+	line-height: 84px;
+	letter-spacing: -1px;
+}
+
+.large, h2 {
+	font-size: 47px;
+	line-height: 48px;
+}
+
+.bigger, h3 {
+	font-size: 29px;
+	line-height: 36px;
+}
+
+.big, h4 {
+	font-size: 25px;
+	line-height: 30px;
+}
+
+body {
+	font: 18px/24px "Times New Roman", Times, serif;
+}
+
+.small, small {
+	font-size: 13px;
+	line-height: 18px;
+}
+
+/* Selection colours (easy to forget) */
+
+::selection 	 	{background: rgb(255,255,158);}
+::-moz-selection 	{background: rgb(255,255,158);}
+img::selection 		{background: transparent;}
+img::-moz-selection	{background: transparent;}
+body {-webkit-tap-highlight-color: rgb(255,255,158);}
+
+
+
+/*		Default Layout: 992px. 
+		Gutters: 24px.
+		Outer margins: 48px.
+		Leftover space for scrollbars @1024px: 32px.
+-------------------------------------------------------------------------------
+cols    1     2      3      4      5      6      7      8      9      10
+px      68    160    252    344    436    528    620    712    804    896    */
+
+body {
+	width: 896px;
+	padding: 72px 48px 84px;
+	background: #fff;
+	color: rgb(60,60,60);
+	-webkit-text-size-adjust: 100%; /* Stops Mobile Safari from auto-adjusting font-sizes */
+}
+
+
+
+/*		Tablet Layout: 768px.
+		Gutters: 24px.
+		Outer margins: 28px.
+		Inherits styles from: Default Layout.
+-----------------------------------------------------------------
+cols    1     2      3      4      5      6      7      8
+px      68    160    252    344    436    528    620    712    */
+
+@media only screen and (min-width: 768px) and (max-width: 991px) {
+	
+	body {
+		width: 712px;
+		padding: 48px 28px 60px;
+	}
+}
+
+
+
+/*		Mobile Layout: 320px.
+		Gutters: 24px.
+		Outer margins: 34px.
+		Inherits styles from: Default Layout.
+---------------------------------------------
+cols    1     2      3
+px      68    160    252    */
+
+@media only screen and (max-width: 767px) {
+	
+	body {
+		width: 252px;
+		padding: 48px 34px 60px;
+	}
+	
+}
+
+
+
+/*		Wide Mobile Layout: 480px.
+		Gutters: 24px.
+		Outer margins: 22px.
+		Inherits styles from: Default Layout, Mobile Layout.
+------------------------------------------------------------
+cols    1     2      3      4      5
+px      68    160    252    344    436    */
+
+@media only screen and (min-width: 480px) and (max-width: 767px) {
+	
+	body {
+		width: 436px;
+		padding: 36px 22px 48px;
+	}
+	
+}
+
+
+/*	Retina media query.
+	Overrides styles for devices with a 
+	device-pixel-ratio of 2+, such as iPhone 4.
+-----------------------------------------------    */
+
+@media 
+	only screen and (-webkit-min-device-pixel-ratio: 2),
+	only screen and (min-device-pixel-ratio: 2) {
+	
+	body {
+	
+	}
+	
+}

inc/roots-actions.php

@@ -93,6 +93,8 @@ function roots_get_stylesheets() {
 		$styles .= "\t<noscript>\n";
     $styles .= stylesheet_link_tag('/adapt/mobile.css', 1);
 		$styles .= "\t</noscript>\n";
+	} elseif ($roots_css_framework === 'less') {
+    $styles .= stylesheet_link_tag('/less/less.css');
 	}
 
 	if (class_exists('RGForms')) {

inc/roots-options.php

@@ -99,6 +99,15 @@ $roots_css_frameworks = array(
       'sidebar' => 'grid_4'
     )
   ),
+  'less' => array(
+		'name'     => 'less',
+		'label'   => __('Less Framework 4', 'roots'),
+    'classes' => array(
+      'container' => 'container',
+      'main'    => 'grid_6',
+      'sidebar' => 'grid_4'
+    )
+  ),
   'none' => array(
 		'name'     => 'none',
 		'label'   => __('None', 'roots'),