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