Add most of components and prepare for V1 Release

src/utils/WatchPrimitiveProperties.js

@@ -0,0 +1,24 @@
+/**
+ * Watch the individual properties of a PoD object, instead of the object
+ * per se. This is different from a deep watch where both the reference
+ * and the individual values are watched.
+ *
+ * In effect, it throttles the multiple $watch to execute at most once per tick.
+ */
+export default function WatchPrimitiveProperties (vueInst, propertiesToTrack, handler, immediate = false) {
+  let isHandled = false
+
+  function requestHandle () {
+    if (!isHandled) {
+      isHandled = true
+      vueInst.$nextTick(() => {
+        isHandled = false
+        handler()
+      })
+    }
+  }
+
+  for (let prop of propertiesToTrack) {
+    vueInst.$watch(prop, requestHandle, {immediate})
+  }
+}