merge mod_bridgecall, mod_echo, mod_park, and mod_playback all into mod_dptools. You will need to remove these from your modules.conf and configuration files.
move some applications to use the new module interface macros.


git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@5342 d0543943-73ff-0310-b7d9-9358b9ac24b2