Merge the main set of changes from team/russell/chan_console.

Add a new console channel driver, chan_console, which is a console channel
driver that uses portaudio as a cross platform audio interface.  It was written
to provide a console channel driver that works with Mac CoreAudio, but it
supports a number of other audio interfaces, as well, including OSS and ALSA.
It could one day be the single console channel driver, but does not yet have
as many features as chan_oss.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@95412 65c4cc65-6c06-0410-ace0-fbb531ad65f3