Step one towards the new PyDAW...  The bigger, more epic changes are
forthcoming soon...
Step 2:  Allow audio to be moved around freely...
Big huge work towards making the audio sequencer capable of doing all of
the things one would expect an audio sequencer to do...  It can't load
audio files right now because I need to implement a UID/pool system,
committing now to provide an undo point if that goes badly...
Make the dict file conform with the back-end string parsing...  Originally
the back-end was never supposed to use those files, but now the wav file
pool is going to use it...

This does break backwards compatibility with previous PyDAWv3 project
formats...
Got everything compiling...  I won't bother running it because I know it
will SEGFAULT, but the only thing left to do is get the wav file pool
working, and everything should work...  Then the only thing left to do
on this feature branch is moving audio items to the region scope...
Added most of the types and functions needed to implement an audio pool,
committing now before trying to implement in the PyDAW engine...
Ha!  Got the pool/uid lookup working...  Success is now imminent...
Show the file name on the audio item instead of the file UID.
Begin changing sizes around...
Big epic overhaul to move audio to the region level...  It's not making
any noise, and there are plenty of bugs and inconsistencies, but I did
get it to stop SEGFAULTing...
Initial round of fixing...
Fixed a crash...  It does kind of work now, but there's still plenty of bugs.
More cleanups and fixes, still kind of broken...
Getting really close to working, it's correct at application startup, but
nothing happens when you do something during a current section...

Once I get that ironed out, it just needs some standard mouse/keyboard
editing functions and a real file browser, then this branch is finished...
Eh... Fixed it, not really sure WTF was wrong with the way I was doing it
though...  It should be smooth sailing from here...
..and with this shiny new drag-n-drop file browser, PyDAW audio sequencing
is no longer a joke...  There are still loose ends to tie up for this
release, but success is now imminent...