A very solid initial attempt at zoom that doesn't use the crappy built-in
Qt .scale(x, y) method...  Still working out a few kinks, hence it's own
branch.
Anchor the ruler to the QGraphicsView...
Fix the ruler being set in the incorrect position intially under certain
conditions.
Don't reload the items from disk every time zoom changes...
Minor tweak...
Fix 16th quantize being screwed up...
Fix line drawing...
Keep the text label anchored to the middle of the item even when scaled.
Fix the audio seq region not zooming correctly on first load...