BLD: add support for "python setup.py develop" / "python setup.py bdist_wheel"
BLD: add support for "python setup.py develop" / "python setup.py bdist_wheel"

Taken over from Scipy's setup.py

aaren/pywt,PyWavelets/pywt,michelp/pywt,michelp/pywt,eriol/pywt,eriol/pywt,rgommers/pywt,eriol/pywt,rgommers/pywt,aaren/pywt,ThomasA/pywt,PyWavelets/pywt,ThomasA/pywt,aaren/pywt,rgommers/pywt,rgommers/pywt,grlee77/pywt,kwohlfahrt/pywt,kwohlfahrt/pywt,michelp/pywt,kwohlfahrt/pywt,grlee77/pywt,ThomasA/pywt