Updated mod_cdr to match changes in core to switch_channel_t, added in some new API commands, added new functionality (depends on a define and patching apr_queue.c/h) changes merged from mishehu branch.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3564 d0543943-73ff-0310-b7d9-9358b9ac24b2