go.talks: update README

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/94100043
diff --git a/README b/README
index 3803b2f..fded028 100644
--- a/README
+++ b/README
@@ -1,3 +1,7 @@
-This repository holds the Go presentation tool (present) and various Go talks.
+This repository holds various Go talks that may be viewed with the present tool.
+
+To install the present tool, use go get:
+
+	go get code.google.com/p/go.tools/cmd/present
 
 To submit changes to this repository, see http://golang.org/doc/contribute.html.