bump version to 0.7a2
diff --git a/doc/pyOpenSSL.txt b/doc/pyOpenSSL.txt
index 3e5c9c2..a66774e 100644
--- a/doc/pyOpenSSL.txt
+++ b/doc/pyOpenSSL.txt
@@ -342,6 +342,9 @@
           Return an integer giving the first four bytes of the MD5 digest
           of the DER representation of the name.
 
+   der()
+          Return a string giving the DER representation of the name.
+
    X509Name objects have the following members:
 
    countryName
@@ -1008,4 +1011,4 @@
                             Python OpenSSL Manual
      __________________________________________________________________
 
-   Release 0.7a1.
+   Release 0.7a2.