[Enh] More spatial statistics

[JusteRaimbault]

I'm not sure we aim at becoming a spatial statistics library but still it would be very useful to begin including more spatstat methods (we already have Ripley e.g.) - let say GWR for example - plus I can not find any spatial statistics library in scala so maybe there is an opportunity here also

[JusteRaimbault]

(from duplicate issue):

• spatstat primitives (point pattern analysis, autoregressive models (?), gwr, rypley K etc.)
• spatial stationarity

[JusteRaimbault]

For spatial stationarity and a link with approximate bayesian computation: Verstegen, J. A., Karssenberg, D., van der Hilst, F., & Faaij, A. P. (2016). Detecting systemic change in a land use system by Bayesian data assimilation. Environmental modelling & software, 75, 424-438.