Move sample frontend from public to public\sample

public/sample/main.css

@@ -0,0 +1,59 @@
+* {
+  margin: 0;
+  padding: 0;
+}
+
+html, body {
+  width: 100%;
+  height: 100%;
+}
+
+.sidepane {
+  height: 100%;
+  background: #E8E8EA;
+}
+
+.sidepane .form {
+  height: 80px;
+  margin: 10px 0;
+}
+
+.sidepane .assets {
+  width: 100%;
+}
+
+#assetText {
+  font-size: 24px;
+}
+
+.assets .text, .assets .image {
+  margin: 10px 0;
+}
+.assets .image ul li {
+  width: 50px;
+  height: 50px;
+  margin-right: 5px;
+  float: left;
+  overflow: hidden;
+}
+.assets .image ul li img {
+  width: 100%;
+  height: 100%;
+}
+
+.canvas .block {
+  position: relative;
+  width: 600px; height: 600px;
+  margin: 10px;
+  border: 1px solid;
+  box-shadow: 0px 0px 5px black;
+}
+
+.item {
+  border: 1px solid transparent;
+  position: absolute;
+}
+
+.item.selected {
+  border-color: blue;
+}