Updated readme file to explain.

readme.md

@@ -1,3 +1,15 @@
+# Readme
+
+SNFClient is ia simple command line wrapper around SNFServer's XCI interface.
+In fact, if you want to develop directly to the XCI interface you can use SNFClient
+in debug mode (SNFDebugClient) to demonstrate how XCI is called and what to expect.
+
+## This readme is a journal, really...
+
+This is a combined readme and change log-- more of a journal really, because
+readme is immediately visible in online git repo's and because it's more flexible
+and less cluttered than having several files.
+
 # ChangeLog
 
 ## [3.1] 20191104_M