add: javascript support

app/src/main/java/com/stardust/scriptdroid/App.java

@@ -0,0 +1,21 @@
+package com.stardust.scriptdroid;
+
+import android.app.Application;
+
+/**
+ * Created by Stardust on 2017/1/27.
+ */
+
+public class App extends Application {
+
+    private static App instance;
+
+    public static App getApp() {
+        return instance;
+    }
+
+    public void onCreate() {
+        super.onCreate();
+        instance = this;
+    }
+}