Replacing the SCSS->CSS conversion library by a newer one made by Leaf Corcoran: http://leafo.github.io/scssphp, tweaked to work on PHP 5.3

SVN:trunk[4203]

lib/scssphp/src/Util.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * SCSSPHP
+ *
+ * @copyright 2012-2015 Leaf Corcoran
+ *
+ * @license http://opensource.org/licenses/MIT MIT
+ *
+ * @link http://leafo.github.io/scssphp
+ */
+namespace Leafo\ScssPhp;
+
+use Leafo\ScssPhp\Base\Range;
+/**
+ * Utilties
+ *
+ * @author Anthon Pang <anthon.pang@gmail.com>
+ */
+class Util
+{
+    /**
+     * Asserts that `value` falls within `range` (inclusive), leaving
+     * room for slight floating-point errors.
+     *
+     * @param string $name  The name of the value. Used in the error message.
+     * @param Range  $range Range of values.
+     * @param array  $value The value to check.
+     * @param string $unit  The unit of the value. Used in error reporting.
+     *
+     * @return mixed `value` adjusted to fall within range, if it was outside by a floating-point margin.
+     *
+     * @throws \Exception
+     */
+    public static function checkRange($name, Range $range, $value, $unit = '')
+    {
+        $val = $value[1];
+        $grace = new Range(-1.0E-5, 1.0E-5);
+        if ($range->includes($val)) {
+            return $val;
+        }
+        if ($grace->includes($val - $range->first)) {
+            return $range->first;
+        }
+        if ($grace->includes($val - $range->last)) {
+            return $range->last;
+        }
+        throw new \Exception("{$name} {$val} must be between {$range->first} and {$range->last}{$unit}");
+    }
+}