CRAN release 1.2.6

This version updates the spatial functions to use sf rather than sp. Functions ending in "..._spatialpolygons" have been replaced with equivalent functions ending in "..._sf"

CRAN release 1.2.5

minor formatting differences in documentation and structure (e.g. F t…

…o FALSE, spaces added, etc)

1.2.4

Version 1.2.4, submitted to CRAN on 27/2/2020