MZX TODO:

~Provide cleaner exit implementation in file format loaders/filters
~Re-vamp the entirety of MZX's clipboard implementation
~Pray SDL weeds out some of its bothersome minutiae (as of SDL 1.2.12 it hasn't).
~Fix MIDI implementation, possibly
~Add icon implementation
~Strip bad Robotic lines when exporting to text files.
~AARGH MIXMOD)@#$(%^#$)^(#
~Increase portability to anything within reason.