Adding Chrome Web Store PHP Hello World

chrome/common/extensions/docs/examples/apps/hello-php/main.css

+body {
+  font-family: Arial, Verdana, san-serif;
+  font-size: 11pt;
+  color: #666;
+  margin: 0;
+}
+
+nav {
+  display: block;  /* for older browsers */
+  text-align: right;
+  margin-bottom: 10px;
+  padding: 10px;
+  border-bottom: 1px solid #C6D2EB;
+  background: -moz-linear-gradient(top, #fff, #EEF1F9 60%, #EEF1F9);
+  background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#fff), to(#EEF1F9), color-stop(.6, #EEF1F9));
+  text-shadow: 1px 1px 1px #fff;
+}
+
+nav span {
+  float: left;
+  font-weight: bold;
+}
+
+a {
+  color: #2F58A4;
+  text-decoration: none;
+}
+
+a:hover {
+  text-decoration: underline;
+}
+
+form {
+  margin: 0;
+}
+
+input[type='text'] {
+  padding: 3px;
+}
+
+li {
+  list-style: none;
+}
+
+.error {
+  margin: 10px 0 10px;
+  padding: 10px;
+  text-align: center;
+  border: 1px solid red;
+  color: red;
+  font-weight: bold;
+  background-color: #ffffcc;
+  -moz-border-radius: 5px;
+  border-radius: 5px;
+  text-shadow: 2px 2px 2px #ccc;
+}
+
+#container {
+  margin-top: 10px;
+  padding: 10px;
+}
+
+#access-level {
+  text-align: center;
+  padding: 15px;
+  border: 1px dotted #C6D2EB;
+  font-size: 12pt;
+  -moz-border-radius: 15px;
+  border-radius: 15px;
+  width: 550px;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+#license-server-response span {
+  font-weight: bold;
+}
+
+#license-server-response span.full {
+  color: green;
+}
+
+#license-server-response span.free_trial {
+  color: orange;
+}
+
+#license-server-response span.no {
+  color: red;
+}
+