add inclusion options for different parts of orders

Now it is possible to get basic order Data ans include more information
if needed only. There are setInclude methods for
-addresses
-items
-payment
-shipment
Merge branch 'master' into develop
add support for filtering

Now it is possible to filter the resultset before triggering the export.
->setExportFilters(array('export_filters' =>array('fieldname' =>
'value')).
add new features to documentation

Added documentation for filters and setIncludes.