Adds Result Generator for API calls.
Adds Result Generator for API calls.

This allows for iterating over a set of results in chunks so you don't have to
transfer and then hold the entire dataset in memory.

>>> cci_iter = client['Account'].getVirtualGuests(iter=True, chunk=100, ...)
>>> for cci in cci_iter:
>>>     print cci['fqdn']

Still needs tests.

iftekeriba/softlayer-python,cloudify-cosmo/softlayer-python,allmightyspiff/softlayer-python,nanjj/softlayer-python,Neetuj/softlayer-python,softlayer/softlayer-python,skraghu/softlayer-python,briancline/softlayer-python,kyubifire/softlayer-python,underscorephil/softlayer-python