Document requirement for ipaddr and bitarray modules

Also update configure.ac.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

INSTALL

@@ -49,6 +49,9 @@ Before installing, please verify that you have the following programs:
   if running on python 2.4 (optional, used by the ``ovfconverter`` tool)
 - `qemu-img <http://qemu.org/>`_, if you want to use ``ovfconverter``
 - `fping <http://fping.sourceforge.net/>`_
+- `Python IP address manipulation library
+  <http://code.google.com/p/ipaddr-py/>`_
+- `Bitarray Python library <http://pypi.python.org/pypi/bitarray/>`_
 
 These programs are supplied as part of most Linux distributions, so
 usually they can be installed via the standard package manager. Also

configure.ac

@@ -720,6 +720,8 @@ AC_PYTHON_MODULE(simplejson, t)
 AC_PYTHON_MODULE(pyparsing, t)
 AC_PYTHON_MODULE(pyinotify, t)
 AC_PYTHON_MODULE(pycurl, t)
+AC_PYTHON_MODULE(bitarray, t)
+AC_PYTHON_MODULE(ipaddr, t)
 AC_PYTHON_MODULE(affinity)
 AC_PYTHON_MODULE(paramiko)