Fixed put() method in Connection Class to prevent hanging file pointers in memory from causing an error.  Also added a definition for STDIN as part of this fix in case not defined.
Fix to updateSku() method in Client Class.  The path it used in it's updateResource() call had a typo.
Fixed Sku Class. Removed options() method as there is no 'SkuOption' resource.  The 'options' field is an array of Sku objects.
Fixed update() method in Shipment Class.  Corrected the typo in the path of the createResource() call and changed getCreateFields() to getUpdateFields()