Include a embedded copy of ipaddr. The license for ipaddr is found insid...

...e

the embedded_ipaddr directory.The embedded copy of ipaddr is only used
if the ipaddr module is not already available.
The embedded copy of ipaddr has been pulled from the ipaddr google code
git repository located at https://code.google.com/p/ipaddr-py/
at commit 8d1eeed6e9f61939fee65b78748248f17ce919e4 (commit date Jun 29, 2012).

Signed-off-by: David <db@d1b.org>