README.txt: Add link to docs

cgay · cgay · commit 6b127db151ce · 2018-05-21T21:30:49.000-04:00
diff --git a/README.txt b/README.txt
@@ -1,2 +1,3 @@
-The documentation for this module is in the "opendylan" repository so
-that it can be integrated into the library reference docs.
+The documentation for this module is in the Open Dylan library
+reference documentation:
+https://opendylan.org/documentation/library-reference/command-line-parser/index.html
