KAZOO-530: try to configure sox on init
KAZOO-530: tempatize sox command
KAZOO-530: export content_type_to_extension
KAZOO-530: normalizes a binary media file to the requested extension;
does not use the disk
KAZOO-530: if media normalization is enabled, attempt to normalize
non-mp3 uploads to mp3
KAZOO-530: set default language
KAZOO-530: save both normalized and original media as attachments to
media doc. Normalized will be the first retrieved usually
KAZOO-530: remove hardcoded mp3 values
KAZOO-530: don't convert if source and destination formats match

create iolist() of response data from port command
KAZOO-530: remove unused macros

use iolist_size in place of byte_size

don't check sox config in init
KAZOO-530: add macros for controlling source and dest args for sox
KAZOO-530: add docs for setup and config of normalization
KAZOO-530: unset normalization_error if successful
KAZOO-530: add sup commands
KAZOO-530: store config as local var
KAZOO-530: make a list of setters
KAZOO-530: increase timeout to 20s when soxing
Merge pull request #437 from 2600hz/KAZOO-530

Kazoo 530 - normalize audio