tweaks abound, updated prettify styles, new sidenav component started, sprite icons started

lib/sidenav.less

@@ -0,0 +1,40 @@
+// SIDE NAV
+// --------
+
+
+.side-nav {
+  padding: @baseLineHeight / 2 0;
+}
+.side-nav .nav-label,
+.side-nav .nav-item {
+  display: block;
+  padding: 3px 16px;
+  text-shadow: 0 1px 0 rgba(255,255,255,.5);
+}
+.side-nav .nav-label {
+  font-size: 11px;
+  line-height: @baseLineHeight;
+  color: @grayDark;
+  text-transform: uppercase;
+}
+.side-nav .nav-group {
+  margin: 0 -1px;
+  list-style: none;
+}
+
+.side-nav .nav-item {
+  font-weight: bold;
+}
+.side-nav .nav-item i {
+  vertical-align: -2px;
+}
+.side-nav .nav-item:hover {
+  text-decoration: none;
+}
+.side-nav .active .nav-item {
+  color: #fff;
+  text-shadow: 0 -1px 0 rgba(0,0,0,.3);
+  #gradient > .vertical(#ccc, #aaa);
+  @shadow: inset 0 1px 0 rgba(0,0,0,.05), inset 0 -1px 0 rgba(0,0,0,.05);
+  .box-shadow(@shadow);
+}