Update docs.

README.md

@@ -14,6 +14,9 @@ Contents:
         csrpubdump/ Dump the public key from an X.509
                     certificate request.
         fragment/   Print a fragment of a file.
+        pembody/    Print the body of a PEM certificate.
+        showimp/    List the external (e.g. non-stdlib and outside the
+                    current working directory) imports for a Go file.
         readchain/  Print the common name for the certificates
                     in a bundle.
         stealchain/ Dump the verified chain from a TLS

cmd/pembody/README

@@ -0,0 +1,13 @@
+pembody
+
+This is a utility for decoding PEM-encoded files and spewing their
+contents to standard output. No trailing newline is appended.
+
+Example:
+        $ cat file.pem
+        -----BEGIN TEST DATA-----
+        c2FtcGxlIGJpbmFyeSBkYXRh
+        -----END TEST DATA-----
+        $ pembody file.pem
+        sample binary data$
+