merge changes from branch http://svn.freeswitch.org/svn/freeswitch/branches/greenlizard/ that changes the session container implementation to use the one in the core, and an inherited class in python.  Please note that this changes the python script api to more closely match (it is still a subset) the one already in place and documented for spidermonkey, and will break all your scripts that are currently working..  Fix a fatal bug causing segfaults in mod_python when using the callbacks.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@5242 d0543943-73ff-0310-b7d9-9358b9ac24b2