v Add gridlines
  - Gridlines flicker during animation [because they're not buffered]
v Stack viewer
v hold ctrl to move by superchunks
v Go to location
v edit terrain toggle
v write chunks out
v resize buffer dynamically
- finalize button bindings

- future
- configurable filepaths (correct even when not in directory)
- book editor should display book data when selected in Stack
- Chunk editor (or at least, viewer)
- @map editor (which chunks are where)
