Clients regenrated to reflect SP API rescent versions update

Introducing Asyn capability of the library.

Merge pull request #42 from MST1122/master

Feeder Helper updated.

Added new API clients for:

- A+ Contnet
- ListingsAitems
- ProductTypeDefinitions
- ShipmentInvoices

Updated clients
- CatalogItems
- Feeds

Merge pull request #31 from double-break/rdt-tokens

Added Restricted Data operations support

Merge pull request #23 from MST1122/master

download feed report helper function bug fixed: check if 'compression…

Merge pull request #22 from Alanaktion/fix-stream-feeds

Fix handling of streams in feed uploads

Merge pull request #20 from MST1122/master

getCredentials('grantless') for grantless operations

Merge pull request #14 from valkan07/master

Implemented getting of migration token and exchange of authorization code to refresh token

Exposing access to the last HTTP response via the base Client class