Adding contacts to a tag doesn't work anymore since release 1.6.1

[gguenther24]

Since the latest release adding contacts to a tag with $tagService->addContacts throws an exception with the message "Cannot use object of type stdClass as array" on infusionsoft/infusionsoft.php line 523. The changes in restfulRequest with $params and $full_params seem to dropping support for stdClass, but the service still uses a stdClass instead of an array.

@ROMzombie can you please fix this?