TST: add --doctests flag to the call to runtests.py on Travis
TST: add --doctests flag to the call to runtests.py on Travis

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