Implementation of reading and writing Acidized loop information to a WAV file

Based on the spec published here - http://www.kvraudio.com/forum/viewtopic.php?t=172636
> Does this work on all architectures?

No, it won't work properly on big-endian systems.So we should modify them to be more robust.
Currently, we have only BE version of float encoding functions in ```taglib2``` branch. But it's easy to add LE version and backport them to ```master``` branch. I will do it in a few days if you are OK. And then you'll be able to ask @rupertdaniel to use those functions.