* Generally improve latency.
  * Get MMAP mode working with playback devices.
    * This can be disabled with the alsa.noMMap config.
  * No longer default to using "plughw" devices and instead just use "hw"
    devices where appropriate.
    * This can be disabled with the alsa.preferPlugHW config.

This removes the need to the -lasound linker option.

This should remove the need to link to libpthread.

This currently untested and only works when compiling as C++.