1. add collectInput method. 2. modify the dtmf callback handlers to better deal...

1. add collectInput method.  2. modify the dtmf callback handlers to better deal with event inputs, as opposed to dtmf inputs.  currently returns a dictionary where one key contains the body, and another contains the headers as a subdictionary.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@5624 d0543943-73ff-0310-b7d9-9358b9ac24b2