updated README

Author: baddstats

README.md

@@ -1,5 +1,19 @@
 # spatstat.linnet
 
-This is an EXPERIMENTAL package UNDER DEVELOPMENT.
+This is a subset of the original `spatstat` package.
+
+The original `spatstat` package is still available
+at its [CRAN page](https://cran.r-project.org/web/packages/spatstat)
+or at [the GitHub repository](https://github.com/spatstat/spatstat).
+
+The original `spatstat` package is currently being split into
+several sub-packages.
+
+This package `spatstat.linnet` is one of the sub-packages. 
 It contains the subset of the functionality of spatstat
 that deals with linear networks.
+
+The reorganisation of the `spatstat` family is described
+on the GitHub repository
+[baddstats/spatstat](https://github.com/baddstats/spatstat).
+