Update README.md
Merge pull request #3 from jasl/patch-1

Update README.md
Add wap pay token and url
Add Alipay::Sign::Wap.verify?
Add Alipay::Notify::Wap.verify?
Update service.rb

是不是需要bump一下版本？
Merge pull request #6 from jasl/patch-1

Update service.rb
Update vesrion to 0.0.4
Update donate link
Generate sec_id in Alipay::Service::Wap.query_string
Manually generate xml
Update README
Alipay::Service::Wap.trade_create_direct_token return token directly
Update README
Merge pull request #8 from HungYuHei/wap-pay

Wap pay
Fix wap verify

In the previous commits, we assume that the notify_id can be accessed by `params['notify_id']`.

But actually the notify params looks like:

```
  {
    :service => 'alipay.wap.trade.create.direct',
    :v => '1.0',
    :sec_id => 'MD5',
    :sign => 'signed_string'
    :notify_data => "<notify><notify_id>NOTIFY_ID</notify_id><other_key>other_value</other_key></notify>"
  }
```

So we have to extract it from `params['notify_data']`
Merge pull request #9 from HungYuHei/fix-wap-verify

Fix wap verify
Add Alipay::Sign::App.verify? & Alipay::Notify::App.verify?
Make sure the lenght of batch_no is 24
Merge pull request #10 from HungYuHei/app-verify

App verify