Switching to setuptools 2.2 from distributed for python setup.

Updating to new ez_setup.py script from setuptools.

Change-Id: I9fb88a46289005f1d3968d63e66b90766a198d45
fixing typeo in setup.py's author's field

Change-Id: I892856d752245a82421ff3cf76ab089d969f1116
Merge topic 'SIMPLEITK-495_UpdateVirtualEnv' into next

9b32b995 fixing typeo in setup.py's author's field
9f1c18af Switching to setuptools 2.2 from distributed for python setup.