Change version from 0.7pre1 to 0.7a1 to satisfy distutils
diff --git a/doc/pyOpenSSL.txt b/doc/pyOpenSSL.txt
index fbc1fae..ff235ad 100644
--- a/doc/pyOpenSSL.txt
+++ b/doc/pyOpenSSL.txt
@@ -1002,4 +1002,4 @@
                             Python OpenSSL Manual
      __________________________________________________________________
 
-   Release 0.6.
+   Release 0.7a1.