This allows the caller to tweak how Lofty writes their tags in various ways.
As this is just a dumping ground for all sorts of format-specific settings, this is best used as an application global config that gets set once.
In its current state, it will only respect `uppercase_id3v2_chunk` and `preferred_padding` (for some formats).
`respect_read_only` and `remove_others` are defined for later use.
closes#228
This is an unfortunate compromise that needed to be made to make it possible to change the null separators in ID3v2.4 to slashes prior to returning the value.
This is the start of making Lofty more general purpose, allowing for the creation of custom tags.
This also makes `TagType::remove_from*` fallible, which makes much more sense.