new file: SiD/README.md

463b9c03 · Whitney Armstrong · 7d14ecff · 463b9c03
Commit 463b9c03 authored Mar 17, 2017 by Whitney Armstrong
--- a/SiD/README.md
+++ b/SiD/README.md
+SiD Detector Concept
+====================
+
+This detector concept was the starting point for the SiEIC design.
+
+Note that up to `sieic3` the detector framework is not DD4hep  compatible.