Using Python new-style classes

This change simply moves to using 'object' as the base class for everything.
Use python 'new style classes'

Here's a simple description:
http://realmike.org/blog/2010/07/18/introduction-to-new-style-classes-in-python/

Example change in output of Core.py:

    class KalturaAssetParamsDeletePolicy:

Becomes:

    class KalturaAssetParamsDeletePolicy(object):