Added how to style info to readme

git-svn-id: http://plugins.svn.wordpress.org/lbdesign-button-shortcode/trunk@1287344 b8457f37-d9ea-0310-8a92-e5e31aec5664

readme.txt

  how to use:
 
- [button link="http://something.com" color="red" size="big"]Call to Action![/button]
+ [button link="http://something.com" color="red" size="big"]Call to Action![/button]
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+
+How to style (can also be found in LBD Client Theme):
+
+ /* DEFAULT button shortcode styles */
+a.button {
+	background: $color_buttons; /* Old browsers */
+	color: #fff !important;
+	text-decoration: none;
+	font-weight: bold;
+	padding: 15px 20px;
+	display: inline-block;
+	text-transform: uppercase;
+	margin-bottom: 20px;
+	border: 0;
+}
+a.button:hover,
+a.button:focus {
+	background: $color_buttons_hover; /* Old browsers */
+}
+/* COLOR button styles */
+a.button.orange {
+	background: $color_buttons_alt; /* Old browsers */
+}
+a.button.orange:hover,
+a.button.orange:focus {
+	background: $color_buttons_alt_hover;
+}
+/* SIZE button styles */
+a.button.big {
+	padding: 25px 20px;
+	font-size: 1.2em;
+}
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