New features
* Input images can be dask images now. They will be converted to numpy before passing over to SimpleITK
* new filters
* bilateral_filter,
* laplacian_filter
* laplacian_of_gaussian_filter
* binominal_blur_filter
* canny_edge_detection
* gradient_magnitude
* h_maxima
* h_minima
* otsu_multiple_thresholds
* regional_maxima
* regional_minima
* richardson_lucy_deconvolution
* wiener_deconvolution
* tikhonov_deconvolution
* rescale_intensity
* sobel
* black_top_hat
* white_top_hat