refs #36
- Cvatlib_Voice_Simple object is created and setup
- enumerates automatically a list of in and output devices.
- both device lists are accessable immediately
- added a sample demonstrating the interface so far
refs #81
refs #36
- Added a common class CAudioDevice encapsulating each audio device
- One subclass for input and output devices
- Changed IVoice interface slightly to better fit into the event flow
refs #81