Merge from branch opuswrite

Build & typo fixes

Comments object is necessary even if empty (otherwise the library crashes)

First cut at Opus file writer

Merge from branch simplewavread, including prior merge from minimp3 branch

Support float wav, skip extended fmt chunk

Fix 24-bit & multi-channel reads

Fix 16-bit (but not yet 24-bit) reading

Make these private, for documentation purposes

First, non-working cut at simple wav reader

First attempt at MiniMP3 wrapper

Fix inadvertant Qt-ism, and remove very old alternative code

Fix typo

Convert Makefiles to format similar to other bqlibs

Avoid compiler warning

Fix compiler warnings

Add references to other bqlibs

Add Opus paths & test

Remove noisy output

Prevent Ogg reader from silently returning broken reader when faced with non-Ogg data