Add more units and eliminate some duplicates

see https://developer.mozilla.org/en-US/docs/CSS/length#Units

Author: sabberworm

CHANGELOG.md

@@ -25,6 +25,12 @@
 * *No backwards-incompatible changes*
 * *No deprecations*
 
+### 5.0.3 (2013-03-21)
+
+* More size units recongnized
+* *No backwards-incompatible changes*
+* *No deprecations*
+
 ## 4.0
 
 ### 4.0.0 (2013-03-19)

lib/Sabberworm/CSS/Value/Size.php

@@ -4,9 +4,9 @@
 
 class Size extends PrimitiveValue {
 
-	const ABSOLUTE_SIZE_UNITS = 'px/deg/s/cm/pt/in/pc/cm/mm';
-	const RELATIVE_SIZE_UNITS = '%/em/ex';
-	const NON_SIZE_UNITS = 'deg/grad/rad/turns/s/ms/Hz/kHz';
+	const ABSOLUTE_SIZE_UNITS = 'px/cm/mm/mozmm/in/pt/pc/vh/vw/vm/vmin/vmax/rem'; //vh/vw/vm(ax)/vmin/rem are absolute insofar as they don’t scale to the immediate parent (only the viewport)
+	const RELATIVE_SIZE_UNITS = '%/em/ex/ch';
+	const NON_SIZE_UNITS = 'deg/grad/rad/s/ms/turns/Hz/kHz';
 
 	private $fSize;
 	private $sUnit;