Feature/pre 1.6

We have a client with a PBX system running an old Asterisk version. The 'show version' command is returning
<pre>Asterisk 1.4.31 built by root @ rpmbuild32.elastix.palosanto.com on a i686 running Linux on 2010-05-11 23:20:04 UTC</pre>

This means that the Manager:
<ul>
<li>Is sending Link events instead of Bridge events</li>
<li>Is sending OldName instead of Channel in Rename events</li>
</ul>

Thus, we have made the changes needed for this Asterisk version into PAMI.

I don't know if it will be interesting for the master branch, but perhaps it would be interesting to have a pre-1.6 branch as we have.

Regards,
Miguel