Enhancements:
-------------

* Add relative path support for load_setup_py_data jinja2 function  #2700

Bug fixes:
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* fix hoisting of archives containing folders named same as top-level folder.  These subfolders were being removed inappropriately.  #2692
* Fall back gracefully when psutil fails to import.  Disk and total time stats still available; memory and CPU time are not when psutil is unavailable.  #2693
* Fix directory size computation not being recursive, use scandir for walk operations on py27  #2699