advanced product options

[wonderfan]

The options data can be exported, imported and migrated.

[wonderfan]

In the js file, the class and object are used.

[wonderfan]

The anatomy of configuration file:

1. The parent node is config
2. declare the version in the modules node;
3. add the translate file inside the frontend node;
4. define the routers inside the frontend node;
5. add the layout update file;
6. listen the order save, block to html and product collection load events in the scope of frontend side;
7. listen the product qty and order item event in the global level
8. in the models tag, specify the model class and entities;
9. use rewrite to override the product options model and other resource model;
10. The import and export product models are also rewritten.
11. Some of blocks and helpers are also overridden;
12. In the admin tag, add the events, menu and layout update