core.js: Updating README to reflect the need to setup GitHub
SSH keys and use npm with ssh+git to install JS packages.
This is needed until we open up the repositories on GitHub.

Change-Id: Ia026217b1cea4eb09713bd84794024e4dadf75dd
diff --git a/README.md b/README.md
index c77ae12..9a90b51 100644
--- a/README.md
+++ b/README.md
@@ -5,9 +5,13 @@
 
 ## Install
 
-`npm` can be used to install this library:
+## Install
+Since Vanadium is currently hosted in private repositories, you would need to
+[setup SSH keys for Github]
+(https://help.github.com/articles/generating-ssh-keys/)
+first and then use npm to install directly from GitHub:
 
-    npm install --save git@github.com:vanadium/js.git
+    npm install --save git+ssh://git@github.com:vanadium/js.git
 
 ## Usage