add comment about check note

cran-comments.md

@@ -3,3 +3,11 @@
 0 errors | 0 warnings | 1 note
 
 * This is a new release.
+
+The note on check is:
+
+>Package has a FOSS license but eventually depends on the following
+>  package which may restrict use:
+>    ChemmineOB
+
+ChemmineOB is an R package with the [Artistic-2.0 license](https://github.com/girke-lab/ChemmineOB/blob/master/LICENSE), which does appear to be FOSS.  Other R packages