rename Helper to ClassMaker
remove module Formatters namespacing from formatters
add .format class methods for formatters
add TagFormatter superclass for formatter classes
refactor formatter classes to inherit from TagFormatters
remove duplicate method calles from BitRate & Date
refactor FFmpeg#update_tags to use TagWriter.write
refactor FFmpeg#read_tags logic into TagReader
refactor Converter Module to be a Class
move Converter into ffmpeg/ & adjust require paths
move Commander into /ffmpeg & adjust paths
refactor FFmpeg; TagReader, TagWriter, & Converter now inherit from FFmpeg
refactor Commander#command constructor
remove blank Include from TagLine
remove require for Formatters from TagLine
remove SimpleCov
update Gemfile.lock
include Enumerable in TagStruct
refactor AudioFile specs
create AutoLoader class; remove Formatters module; replace in Taggable