Stop using SoX

[mtolly]

3c31b7a tried to use the WAVE library on Hackage instead of SoX, but it uses a huge amount of memory (I saw 1 GB), even though the library docs say it does lazy IO. I might write a replacement that uses explicit IO instead. For our purposes it does not need to support seeking; just one-way start-to-finish reading and writing. It does need to support asking for a varying number of samples at once because of the sample offset in Take the Time's drums.

While I'm at it I might also port the AIFC reader from C to Haskell (thus removing the recent CPP hackery on Windows). This would allow going straight from multiple input AIFCs to the output backing WAV without the intermediate WAVs.

[mtolly]

This is done with v0.4.