Exchange numpy.ndarrays for memoryviews in wavefd
Exchange numpy.ndarrays for memoryviews in wavefd

Changed the ndarray buffers in the scalar wave simulation for the newer
memoryviews in Cython, e.g., double[:,::1]. Supposed to be faster and
more updated syntax.

eusoubrasileiro/fatiando,victortxa/fatiando,fatiando/fatiando,eusoubrasileiro/fatiando_seismic,fatiando/fatiando,cmeessen/fatiando,cmeessen/fatiando,rafaelmds/fatiando,santis19/fatiando,rafaelmds/fatiando,mtb-za/fatiando,santis19/fatiando,eusoubrasileiro/fatiando,victortxa/fatiando,mtb-za/fatiando,eusoubrasileiro/fatiando,drandykass/fatiando,drandykass/fatiando,eusoubrasileiro/fatiando_seismic