[Osalp-dev] More changes

[Bruce F. <for...@ad...>]

I have made more bug fixes and changes in preparation for 
going beta. These have been checked into CVS:

1) Fixed the dumpChain function in aflibChain so that it works again.

2) Fixed the mixing option in the example program prog

3) Fixed the passing of aflibConfig data in the aflibAudio base class.
It was not working correctly when an object in a chain was disabled.

4) Added the aflibAudioStereoToMono convience class. It is derived from 
class aflibAudioMixer and will convert a stereo to a mono signal. It
will convert both channels, channel 1 or channel 2. It will also pass
a mono signal straight through.

Bruce Forsberg