Determine mime type correctly for LPCM wav files for PS3.

Added lots of trace information to give insight in the decision making process.

Based on https://github.com/ps3mediaserver/ps3mediaserver/commit/50b75f014da892157a36aa83ac6b3a5a8a48ac49#commitcomment-4102063
Merge pull request #122 from UniversalMediaServer/PMS

Determine mime type correctly for LPCM wav files for PS3.