Made the OpenMPT / legacy OpenMPT and mpg123 libraries pre-built.
Changed the OpenMPT and vgmstream plugins to import the libraries as
they are now. Made mpg123 embedded and imported by the main binary,
since it's now shared by two plugins.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
Most file formats the player supports may or may not have UTF-8 safe
strings in their metadata. This should not be assumed to be UTF-8, and
when it is assumed, it results in nil NSString objects, which results in
inline initializers crashing due to uncaught exceptions.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
