feat:初始化

+{
+  "name": "jiaoyi/indigo-common-php",
+  "description": "indigo-common-php",
+  "require": {},
+  "autoload": {
+    "psr-4": {
+      "jiaoyi\\indigo-common-php\\": "src/"
+    }
+  }
+}

+<?php
+
+namespace Jiaoyin\Test;
+
+class Test {
+    public function sayHello() {
+        return "Hello from My Private Library!";
+    }
+}