* Ogre materials are now loading, though my Monkey material is
incompatible with Ogre 2
* Convert audio from recording format to playback format. This was
necessary because I record at 48kHz but playback is at
44.1kHz. Without this conversion, recorded audio would sound lower,
because it was being played at a slower rate
* Make sure to close audio devices, else the operating system will
think the device is still busy, and no other apps will play audio
* Removed unused code and comments which are likely to get out of sync
* Added audio-dump-recorded-buffer, which outputs in a format gnuplot
can easily read
* Added configuration for a pretty plot of the audio data