lib/time: add README, update.bash script
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5674104
diff --git a/lib/time/README b/lib/time/README
new file mode 100644
index 0000000..be519fe
--- /dev/null
+++ b/lib/time/README
@@ -0,0 +1,9 @@
+The zoneinfo directory contains time zone files compiled using
+the code and data maintained as part of the IANA Time Zone Database.
+The IANA asserts that the database is in the public domain.
+
+For more information, see
+http://www.iana.org/time-zones
+ftp://ftp.iana.org/tz/code/tz-link.htm
+http://tools.ietf.org/html/draft-lear-iana-timezone-database-05
+
