Added  members and services to support new wsdl schema

Fix for Issue #2 

I tried below solution :
Added the `X-PAYPAL-SERVICE-VERSION: 1.8.2` header on every request to handle the version conflict, but didn't worked.
I got the following error:
```yaml
responseEnvelope:
  timestamp: 2013-03-21 11:00:06.874000000 -07:00
  ack: Failure
  correlationId: 40ad0ffdbc57f
  build: '5472483'
error:
- errorId: 2022
  domain: CoreRuntime
  subdomain: Inbound_Meta_Data
  severity: Error
  category: Request
  message: Service version 1.8.2 is unsupported
  parameter:
  - value: 1.8.2
```