Document requests library prereq.
diff --git a/README.md b/README.md
index 1ce19c6..19f7660 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,16 @@
Each script also supports other flags. Use --help to see them.
+# Prerequisites
+
+The client library requires
+[requests](http://www.python-requests.org/) to be installed.
+
+You can install it with `pip` or `easy_install`
+([instructions](http://www.python-requests.org/en/latest/user/install/))
+or install your operating system specific package. On Ubuntu or
+Debian, it is in the `python-requests` package.
+
# API Keys
Organization Adminstrators can find their API key on their
@@ -18,4 +28,4 @@
# Bugs/Support
-To report bugs, please email gci-support@google.com
+To report bugs, please email [gci-support@google.com](mailto:gci-support@google.com).
