PYTHONIOENCODING=utf8 pip install numpy
* Fix for encoding issue when installing from Windows executable on Python 3.
+* Issue #323: Allow `setup_requires` requirements to supercede installed
+ requirements. Added some new keyword arguments to existing pkg_resources
+ methods. Also had to updated how __path__ is handled for namespace packages
+ to ensure that when a new egg distribution containing a namespace package is
+ placed on sys.path, the entries in __path__ are found in the same order they
+ would have been in had that egg been on the path when pkg_resources was