update JAVA_SUPPORT, RELEASE_NOTES, and remove building samples from platform-java7
diff --git a/README.md b/README.md
index 0bee997..2e28660 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,8 @@
 org.apache.edgent.java7 and org.apache.edgent.android.  e.g.
     org.apache.edgent.api  org.apache.edgent.api.java7
 
+See `JAVA_SUPPORT.md` for more information on coordinates, etc.
+
 The Edgent API is most easily used by using java8 lambda expressions.
 If you only want to deploy your Edgent application to a java8 environment
 then your application may use any java8 features it chooses.  You compile