Update README.md to point to timedata.

README.md

@@ -1,3 +1,12 @@
+This version of the code still works, but is in mothballs!
+
+Active development continues at https://github.com/timedata-org/timedata
+
+At some point in the future, the unused code here will be merged into that or
+vice-versa!  Stay tuned for more excitement.
+
+----
+
 [echomesh](http://echomesh.org):  An array of noisy, reactive little computers.
 
 echomesh is a universal system for scoring interactive compositions and installations, particularly ones with a large number of small computers controlling lights, sound, video and other hardware.