Add Moiré transform

[mkowen1]

Following the procedure of Liu et al (2018), https://arxiv.org/pdf/1804.03809.pdf, we can generate a psuedo-Moire pattern using a 10 step process (page 3 of their paper). This would be a helpful feature to add to Pillow for further research in Moire patterns in DCNNs. Cheers

[KananVyas]

is this feature added in pillow?

[radarhere]

No, this feature has not been added to Pillow yet.