add caption to comparison table

rwd/diffit

@@ -0,0 +1,6 @@
+#!/bin/bash
+echo $1
+touch ../../rwd-a11y/$1
+diff $1 ../../rwd-a11y/$1
+echo "===================================="
+exit 0

rwd/out.diff

@@ -0,0 +1,94 @@
+./diffit
+1,6d0
+< #!/bin/bash
+< echo $1
+< touch ../../rwd-a11y/$1
+< diff $1 ../../rwd-a11y/$1
+< echo "===================================="
+< exit 0
+\ No newline at end of file
+====================================
+./libs/jquery.js
+====================================
+./libs/jquery.mobile.css
+====================================
+./libs/jquery.mobile.min.js
+====================================
+./LICENSE
+====================================
+./out.diff
+1,19d0
+< ./diffit
+< 1,6d0
+< < #!/bin/bash
+< < echo $1
+< < touch ../../rwd-a11y/$1
+< < diff $1 ../../rwd-a11y/$1
+< < echo "===================================="
+< < exit 0
+< \ No newline at end of file
+< ====================================
+< ./libs/jquery.js
+< ====================================
+< ./libs/jquery.mobile.css
+< ====================================
+< ./libs/jquery.mobile.min.js
+< ====================================
+< ./LICENSE
+< ====================================
+< ./out.diff
+====================================
+./part1/index.html
+====================================
+./part1/responsive.css
+====================================
+./part2/index.html
+====================================
+./part2/responsive.css
+====================================
+./part4/blue.jpg
+====================================
+./part4/brown.jpg
+====================================
+./part4/comparison.html
+====================================
+./part4/index.html
+====================================
+./part4/orange.jpg
+====================================
+./part4/purple.jpg
+====================================
+./part4/red.jpg
+====================================
+./part4/responsive.css
+95d94
+< 		min-width: 3em;
+====================================
+./part4/responsive.html
+====================================
+./part5/content_popup.html
+====================================
+./part5/content_replaced.html
+====================================
+./part5/index.html
+====================================
+./part5/responsive.css
+====================================
+./part6/checked.png
+====================================
+./part6/event_logger.html
+====================================
+./part6/index.html
+====================================
+./part6/responsive.css
+====================================
+./part6/touch_event_logger.html
+====================================
+./part6/touch_responsive.css
+====================================
+./part6/touch_slider.html
+====================================
+./part6/unchecked.png
+====================================
+./README.md
+====================================

rwd/part4/comparison.html

@@ -12,6 +12,7 @@ <h2>Responsive Comparison Table</h2>
 		</p>
 		<div class="comparison-table">
 			<table tabindex="0">
+				<caption>Compare Colors</caption>
 				<tr>
 					<th scope="col">&nbsp;</th>
 					<th scope="col"><img alt="orange" src="orange.jpg" /></th>