Adding also the release update site

README.adoc

@@ -15,7 +15,16 @@ Check by running `$ dart --version` after installation.
 
 Install the Eclipse https://marketplace.eclipse.org/content/dartboard[plugin from the Marketplace] or use the http://marketplace.eclipse.org/marketplace-client-intro?mpc_install=4711459[image:https://marketplace.eclipse.org/sites/all/themes/solstice/public/images/marketplace/btn-install.png[]] button.
 
-There is also a p2 update site available at: https://download.eclipse.org/dartboard/nightly
+There is also p2 update sites available at.
+
+Nightly:
+
+https://download.eclipse.org/dartboard/nightly
+
+0.1 release:
+
+https://download.eclipse.org/dartboard/0.1
+
 
 == Features