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