ls(sl=True, uuid=True) fails

[RobinScher]

Maya command version cmds.ls(sl=True, uuid=True) returns a list of UUID strings:
Result: [u'BA2653C9-42AB-58FD-4206-009350A025B5', u'194E3BAD-4FAC-AD47-6FA3-9DBFEAFBBAC0']

PyMEL version pymel.ls(sl=True, uuid=True) fails with an error:
Error: MayaNodeError: file ...\pymel\core\general.py line 2306: Maya Node does not exist (or is not unique):: u'BA2653C9-42AB-58FD-4206-009350A025B5'

[RobinScher]

Since the PyMEL ls command returns PyNode objects instead of strings, and PyNode objects have a method to get the uuid, it makes sense to simply ignore the uuid/uid flag to the ls command here. This is a simple change in core/general.py, add to the ls command (I put it at line 1079):

kwargs.pop('uuid', None)
kwargs.pop('uid', None)