Added examples, theme default-shadow. Bumped to v4.

themes.yaml

@@ -1,3 +1,38 @@
+# Default shadow
+# ==============
+default-shadow:
+  page:
+    text: '#fff'
+    header: '#333'
+    background: '#fff'
+    footer:
+      show: true
+      text: "#aaa"
+      background: "#eee"
+
+  page_select:
+    text: "#ccc"
+    background: "#666"
+
+  theme_select:
+    text: "#ccc"
+    background: "#333"
+    border: "#888"
+
+  section:
+    background: '#fff'
+    shadow: 0px 3px 15px 0px rgba(0, 0, 0, 0.15)
+    borders:
+      - ['#fff', '#22a511']
+
+  item:
+    label: '#333'
+    background: '#eaeaea'
+    description: '#555'
+    url: '#666'
+    icon: '#000'
+    hover: 'darker'
+
 # Colorful
 # ========
 colorful: