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
Well, this kind of worries me. Does this work on all architectures? In taglib2 we have methods for LE/BE float encoding. And in aiffproperties.cpp in master have something similar. I wonder if we should rather backport the taglib2 changes.

@TsudaKageyu Do you have any opinion? I don't know much about these float conversions and you did the taglib2 changes.